/* $NetBSD: ffs_vnops.c,v 1.69.4.7 2008/01/21 09:48:08 yamt Exp $ */
/*
* Copyright (c) 1982, 1986, 1989, 1993
* 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. 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_vnops.c 8.15 (Berkeley) 5/14/95
*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: ffs_vnops.c,v 1.69.4.7 2008/01/21 09:48:08 yamt Exp $");
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/resourcevar.h>
#include <sys/kernel.h>
#include <sys/file.h>
#include <sys/stat.h>
#include <sys/buf.h>
#include <sys/event.h>
#include <sys/proc.h>
#include <sys/mount.h>
#include <sys/vnode.h>
#include <sys/pool.h>
#include <sys/signalvar.h>
#include <sys/kauth.h>
#include <sys/fstrans.h>
#include <miscfs/fifofs/fifo.h>
#include <miscfs/genfs/genfs.h>
#include <miscfs/specfs/specdev.h>
#include <ufs/ufs/inode.h>
#include <ufs/ufs/dir.h>
#include <ufs/ufs/ufs_extern.h>
#include <ufs/ufs/ufsmount.h>
#include <ufs/ffs/fs.h>
#include <ufs/ffs/ffs_extern.h>
#include <uvm/uvm.h>
/* Global vfs data structures for ufs. */
int (**ffs_vnodeop_p)(void *);
const struct vnodeopv_entry_desc ffs_vnodeop_entries[] = {
{ &vop_default_desc, vn_default_error },
{ &vop_lookup_desc, ufs_lookup }, /* lookup */
{ &vop_create_desc, ufs_create }, /* create */
{ &vop_whiteout_desc, ufs_whiteout }, /* whiteout */
{ &vop_mknod_desc, ufs_mknod }, /* mknod */
{ &vop_open_desc, ufs_open }, /* open */
{ &vop_close_desc, ufs_close }, /* close */
{ &vop_access_desc, ufs_access }, /* access */
{ &vop_getattr_desc, ufs_getattr }, /* getattr */
{ &vop_setattr_desc, ufs_setattr }, /* setattr */
{ &vop_read_desc, ffs_read }, /* read */
{ &vop_write_desc, ffs_write }, /* write */
{ &vop_lease_desc, ufs_lease_check }, /* lease */
{ &vop_ioctl_desc, ufs_ioctl }, /* ioctl */
{ &vop_fcntl_desc, ufs_fcntl }, /* fcntl */
{ &vop_poll_desc, ufs_poll }, /* poll */
{ &vop_kqfilter_desc, genfs_kqfilter }, /* kqfilter */
{ &vop_revoke_desc, ufs_revoke }, /* revoke */
{ &vop_mmap_desc, ufs_mmap }, /* mmap */
{ &vop_fsync_desc, ffs_fsync }, /* fsync */
{ &vop_seek_desc, ufs_seek }, /* seek */
{ &vop_remove_desc, ufs_remove }, /* remove */
{ &vop_link_desc, ufs_link }, /* link */
{ &vop_rename_desc, ufs_rename }, /* rename */
{ &vop_mkdir_desc, ufs_mkdir }, /* mkdir */
{ &vop_rmdir_desc, ufs_rmdir }, /* rmdir */
{ &vop_symlink_desc, ufs_symlink }, /* symlink */
{ &vop_readdir_desc, ufs_readdir }, /* readdir */
{ &vop_readlink_desc, ufs_readlink }, /* readlink */
{ &vop_abortop_desc, ufs_abortop }, /* abortop */
{ &vop_inactive_desc, ufs_inactive }, /* inactive */
{ &vop_reclaim_desc, ffs_reclaim }, /* reclaim */
{ &vop_lock_desc, ffs_lock }, /* lock */
{ &vop_unlock_desc, ffs_unlock }, /* unlock */
{ &vop_bmap_desc, ufs_bmap }, /* bmap */
{ &vop_strategy_desc, ufs_strategy }, /* strategy */
{ &vop_print_desc, ufs_print }, /* print */
{ &vop_islocked_desc, ffs_islocked }, /* islocked */
{ &vop_pathconf_desc, ufs_pathconf }, /* pathconf */
{ &vop_advlock_desc, ufs_advlock }, /* advlock */
{ &vop_bwrite_desc, vn_bwrite }, /* bwrite */
{ &vop_getpages_desc, genfs_getpages }, /* getpages */
{ &vop_putpages_desc, genfs_putpages }, /* putpages */
{ &vop_openextattr_desc, ffs_openextattr }, /* openextattr */
{ &vop_closeextattr_desc, ffs_closeextattr }, /* closeextattr */
{ &vop_getextattr_desc, ffs_getextattr }, /* getextattr */
{ &vop_setextattr_desc, ffs_setextattr }, /* setextattr */
{ &vop_listextattr_desc, ffs_listextattr }, /* listextattr */
{ &vop_deleteextattr_desc, ffs_deleteextattr }, /* deleteextattr */
{ NULL, NULL }
};
const struct vnodeopv_desc ffs_vnodeop_opv_desc =
{ &ffs_vnodeop_p, ffs_vnodeop_entries };
int (**ffs_specop_p)(void *);
const struct vnodeopv_entry_desc ffs_specop_entries[] = {
{ &vop_default_desc, vn_default_error },
{ &vop_lookup_desc, spec_lookup }, /* lookup */
{ &vop_create_desc, spec_create }, /* create */
{ &vop_mknod_desc, spec_mknod }, /* mknod */
{ &vop_open_desc, spec_open }, /* open */
{ &vop_close_desc, ufsspec_close }, /* close */
{ &vop_access_desc, ufs_access }, /* access */
{ &vop_getattr_desc, ufs_getattr }, /* getattr */
{ &vop_setattr_desc, ufs_setattr }, /* setattr */
{ &vop_read_desc, ufsspec_read }, /* read */
{ &vop_write_desc, ufsspec_write }, /* write */
{ &vop_lease_desc, spec_lease_check }, /* lease */
{ &vop_ioctl_desc, spec_ioctl }, /* ioctl */
{ &vop_fcntl_desc, ufs_fcntl }, /* fcntl */
{ &vop_poll_desc, spec_poll }, /* poll */
{ &vop_kqfilter_desc, spec_kqfilter }, /* kqfilter */
{ &vop_revoke_desc, spec_revoke }, /* revoke */
{ &vop_mmap_desc, spec_mmap }, /* mmap */
{ &vop_fsync_desc, ffs_fsync }, /* fsync */
{ &vop_seek_desc, spec_seek }, /* seek */
{ &vop_remove_desc, spec_remove }, /* remove */
{ &vop_link_desc, spec_link }, /* link */
{ &vop_rename_desc, spec_rename }, /* rename */
{ &vop_mkdir_desc, spec_mkdir }, /* mkdir */
{ &vop_rmdir_desc, spec_rmdir }, /* rmdir */
{ &vop_symlink_desc, spec_symlink }, /* symlink */
{ &vop_readdir_desc, spec_readdir }, /* readdir */
{ &vop_readlink_desc, spec_readlink }, /* readlink */
{ &vop_abortop_desc, spec_abortop }, /* abortop */
{ &vop_inactive_desc, ufs_inactive }, /* inactive */
{ &vop_reclaim_desc, ffs_reclaim }, /* reclaim */
{ &vop_lock_desc, ffs_lock }, /* lock */
{ &vop_unlock_desc, ffs_unlock }, /* unlock */
{ &vop_bmap_desc, spec_bmap }, /* bmap */
{ &vop_strategy_desc, spec_strategy }, /* strategy */
{ &vop_print_desc, ufs_print }, /* print */
{ &vop_islocked_desc, ffs_islocked }, /* islocked */
{ &vop_pathconf_desc, spec_pathconf }, /* pathconf */
{ &vop_advlock_desc, spec_advlock }, /* advlock */
{ &vop_bwrite_desc, vn_bwrite }, /* bwrite */
{ &vop_getpages_desc, spec_getpages }, /* getpages */
{ &vop_putpages_desc, spec_putpages }, /* putpages */
{ &vop_openextattr_desc, ffs_openextattr }, /* openextattr */
{ &vop_closeextattr_desc, ffs_closeextattr }, /* closeextattr */
{ &vop_getextattr_desc, ffs_getextattr }, /* getextattr */
{ &vop_setextattr_desc, ffs_setextattr }, /* setextattr */
{ &vop_listextattr_desc, ffs_listextattr }, /* listextattr */
{ &vop_deleteextattr_desc, ffs_deleteextattr }, /* deleteextattr */
{ NULL, NULL }
};
const struct vnodeopv_desc ffs_specop_opv_desc =
{ &ffs_specop_p, ffs_specop_entries };
int (**ffs_fifoop_p)(void *);
const struct vnodeopv_entry_desc ffs_fifoop_entries[] = {
{ &vop_default_desc, vn_default_error },
{ &vop_lookup_desc, fifo_lookup }, /* lookup */
{ &vop_create_desc, fifo_create }, /* create */
{ &vop_mknod_desc, fifo_mknod }, /* mknod */
{ &vop_open_desc, fifo_open }, /* open */
{ &vop_close_desc, ufsfifo_close }, /* close */
{ &vop_access_desc, ufs_access }, /* access */
{ &vop_getattr_desc, ufs_getattr }, /* getattr */
{ &vop_setattr_desc, ufs_setattr }, /* setattr */
{ &vop_read_desc, ufsfifo_read }, /* read */
{ &vop_write_desc, ufsfifo_write }, /* write */
{ &vop_lease_desc, fifo_lease_check }, /* lease */
{ &vop_ioctl_desc, fifo_ioctl }, /* ioctl */
{ &vop_fcntl_desc, ufs_fcntl }, /* fcntl */
{ &vop_poll_desc, fifo_poll }, /* poll */
{ &vop_kqfilter_desc, fifo_kqfilter }, /* kqfilter */
{ &vop_revoke_desc, fifo_revoke }, /* revoke */
{ &vop_mmap_desc, fifo_mmap }, /* mmap */
{ &vop_fsync_desc, ffs_fsync }, /* fsync */
{ &vop_seek_desc, fifo_seek }, /* seek */
{ &vop_remove_desc, fifo_remove }, /* remove */
{ &vop_link_desc, fifo_link }, /* link */
{ &vop_rename_desc, fifo_rename }, /* rename */
{ &vop_mkdir_desc, fifo_mkdir }, /* mkdir */
{ &vop_rmdir_desc, fifo_rmdir }, /* rmdir */
{ &vop_symlink_desc, fifo_symlink }, /* symlink */
{ &vop_readdir_desc, fifo_readdir }, /* readdir */
{ &vop_readlink_desc, fifo_readlink }, /* readlink */
{ &vop_abortop_desc, fifo_abortop }, /* abortop */
{ &vop_inactive_desc, ufs_inactive }, /* inactive */
{ &vop_reclaim_desc, ffs_reclaim }, /* reclaim */
{ &vop_lock_desc, ffs_lock }, /* lock */
{ &vop_unlock_desc, ffs_unlock }, /* unlock */
{ &vop_bmap_desc, fifo_bmap }, /* bmap */
{ &vop_strategy_desc, fifo_strategy }, /* strategy */
{ &vop_print_desc, ufs_print }, /* print */
{ &vop_islocked_desc, ffs_islocked }, /* islocked */
{ &vop_pathconf_desc, fifo_pathconf }, /* pathconf */
{ &vop_advlock_desc, fifo_advlock }, /* advlock */
{ &vop_bwrite_desc, vn_bwrite }, /* bwrite */
{ &vop_putpages_desc, fifo_putpages }, /* putpages */
{ &vop_openextattr_desc, ffs_openextattr }, /* openextattr */
{ &vop_closeextattr_desc, ffs_closeextattr }, /* closeextattr */
{ &vop_getextattr_desc, ffs_getextattr }, /* getextattr */
{ &vop_setextattr_desc, ffs_setextattr }, /* setextattr */
{ &vop_listextattr_desc, ffs_listextattr }, /* listextattr */
{ &vop_deleteextattr_desc, ffs_deleteextattr }, /* deleteextattr */
{ NULL, NULL }
};
const struct vnodeopv_desc ffs_fifoop_opv_desc =
{ &ffs_fifoop_p, ffs_fifoop_entries };
#include <ufs/ufs/ufs_readwrite.c>
int
ffs_fsync(void *v)
{
struct vop_fsync_args /* {
struct vnode *a_vp;
kauth_cred_t a_cred;
int a_flags;
off_t a_offlo;
off_t a_offhi;
struct lwp *a_l;
} */ *ap = v;
struct buf *bp;
int num, error, i;
struct indir ia[NIADDR + 1];
int bsize;
daddr_t blk_high;
struct vnode *vp;
vp = ap->a_vp;
fstrans_start(vp->v_mount, FSTRANS_LAZY);
/*
* XXX no easy way to sync a range in a file with softdep.
*/
if ((ap->a_offlo == 0 && ap->a_offhi == 0) || DOINGSOFTDEP(vp) ||
(vp->v_type != VREG)) {
error = ffs_full_fsync(vp, ap->a_flags);
goto out;
}
bsize = vp->v_mount->mnt_stat.f_iosize;
blk_high = ap->a_offhi / bsize;
if (ap->a_offhi % bsize != 0)
blk_high++;
/*
* First, flush all pages in range.
*/
mutex_enter(&vp->v_interlock);
error = VOP_PUTPAGES(vp, trunc_page(ap->a_offlo),
round_page(ap->a_offhi), PGO_CLEANIT |
((ap->a_flags & FSYNC_WAIT) ? PGO_SYNCIO : 0));
if (error) {
goto out;
}
/*
* Then, flush indirect blocks.
*/
if (blk_high >= NDADDR) {
error = ufs_getlbns(vp, blk_high, ia, &num);
if (error)
goto out;
mutex_enter(&bufcache_lock);
for (i = 0; i < num; i++) {
if ((bp = incore(vp, ia[i].in_lbn)) == NULL)
continue;
if ((bp->b_cflags & BC_BUSY) != 0 ||
(bp->b_oflags & BO_DELWRI) == 0)
continue;
bp->b_cflags |= BC_BUSY | BC_VFLUSH;
mutex_exit(&bufcache_lock);
bawrite(bp);
mutex_enter(&bufcache_lock);
}
mutex_exit(&bufcache_lock);
}
if (ap->a_flags & FSYNC_WAIT) {
mutex_enter(&vp->v_interlock);
while (vp->v_numoutput > 0)
cv_wait(&vp->v_cv, &vp->v_interlock);
mutex_exit(&vp->v_interlock);
}
error = ffs_update(vp, NULL, NULL,
((ap->a_flags & (FSYNC_WAIT | FSYNC_DATAONLY)) == FSYNC_WAIT)
? UPDATE_WAIT : 0);
if (error == 0 && ap->a_flags & FSYNC_CACHE) {
int l = 0;
VOP_IOCTL(VTOI(vp)->i_devvp, DIOCCACHESYNC, &l, FWRITE,
curlwp->l_cred);
}
out:
fstrans_done(vp->v_mount);
return error;
}
/*
* Synch an open file.
*/
/* ARGSUSED */
int
ffs_full_fsync(struct vnode *vp, int flags)
{
struct buf *bp, *nbp;
int error, passes, skipmeta, inodedeps_only, waitfor;
if (vp->v_type == VBLK &&
vp->v_specmountpoint != NULL &&
(vp->v_specmountpoint->mnt_flag & MNT_SOFTDEP))
softdep_fsync_mountdev(vp);
mutex_enter(&vp->v_interlock);
inodedeps_only = DOINGSOFTDEP(vp) && (flags & FSYNC_RECLAIM)
&& UVM_OBJ_IS_CLEAN(&vp->v_uobj) && LIST_EMPTY(&vp->v_dirtyblkhd);
/*
* Flush all dirty data associated with a vnode.
*/
if (vp->v_type == VREG || vp->v_type == VBLK) {
error = VOP_PUTPAGES(vp, 0, 0, PGO_ALLPAGES | PGO_CLEANIT |
((flags & FSYNC_WAIT) ? PGO_SYNCIO : 0) |
(fstrans_getstate(vp->v_mount) == FSTRANS_SUSPENDING ?
PGO_FREE : 0));
if (error) {
return error;
}
} else
mutex_exit(&vp->v_interlock);
passes = NIADDR + 1;
skipmeta = 0;
if (flags & FSYNC_WAIT)
skipmeta = 1;
loop:
mutex_enter(&bufcache_lock);
LIST_FOREACH(bp, &vp->v_dirtyblkhd, b_vnbufs) {
bp->b_cflags &= ~BC_SCANNED;
}
for (bp = LIST_FIRST(&vp->v_dirtyblkhd); bp; bp = nbp) {
nbp = LIST_NEXT(bp, b_vnbufs);
if (bp->b_cflags & (BC_BUSY | BC_SCANNED))
continue;
if ((bp->b_oflags & BO_DELWRI) == 0)
panic("ffs_fsync: not dirty");
if (skipmeta && bp->b_lblkno < 0)
continue;
bp->b_cflags |= BC_BUSY | BC_VFLUSH | BC_SCANNED;
mutex_exit(&bufcache_lock);
/*
* On our final pass through, do all I/O synchronously
* so that we can find out if our flush is failing
* because of write errors.
*/
if (passes > 0 || !(flags & FSYNC_WAIT))
(void) bawrite(bp);
else if ((error = bwrite(bp)) != 0)
return (error);
/*
* Since we unlocked during the I/O, we need
* to start from a known point.
*/
mutex_enter(&bufcache_lock);
nbp = LIST_FIRST(&vp->v_dirtyblkhd);
}
mutex_exit(&bufcache_lock);
if (skipmeta) {
skipmeta = 0;
goto loop;
}
if (flags & FSYNC_WAIT) {
mutex_enter(&vp->v_interlock);
while (vp->v_numoutput) {
cv_wait(&vp->v_cv, &vp->v_interlock);
}
mutex_exit(&vp->v_interlock);
/*
* Ensure that any filesystem metadata associated
* with the vnode has been written.
*/
if ((error = softdep_sync_metadata(vp)) != 0)
return (error);
if (!LIST_EMPTY(&vp->v_dirtyblkhd)) {
/*
* Block devices associated with filesystems may
* have new I/O requests posted for them even if
* the vnode is locked, so no amount of trying will
* get them clean. Thus we give block devices a
* good effort, then just give up. For all other file
* types, go around and try again until it is clean.
*/
if (passes > 0) {
passes--;
goto loop;
}
#ifdef DIAGNOSTIC
if (vp->v_type != VBLK)
vprint("ffs_fsync: dirty", vp);
#endif
}
}
if (inodedeps_only)
waitfor = 0;
else
waitfor = (flags & FSYNC_WAIT) ? UPDATE_WAIT : 0;
error = ffs_update(vp, NULL, NULL, waitfor);
if (error == 0 && flags & FSYNC_CACHE) {
int i = 0;
VOP_IOCTL(VTOI(vp)->i_devvp, DIOCCACHESYNC, &i, FWRITE,
curlwp->l_cred);
}
return error;
}
/*
* Reclaim an inode so that it can be used for other purposes.
*/
int
ffs_reclaim(void *v)
{
struct vop_reclaim_args /* {
struct vnode *a_vp;
struct lwp *a_l;
} */ *ap = v;
struct vnode *vp = ap->a_vp;
struct inode *ip = VTOI(vp);
struct mount *mp = vp->v_mount;
struct ufsmount *ump = ip->i_ump;
void *data;
int error;
fstrans_start(mp, FSTRANS_LAZY);
if ((error = ufs_reclaim(vp)) != 0) {
fstrans_done(mp);
return (error);
}
if (ip->i_din.ffs1_din != NULL) {
if (ump->um_fstype == UFS1)
pool_cache_put(ffs_dinode1_cache, ip->i_din.ffs1_din);
else
pool_cache_put(ffs_dinode2_cache, ip->i_din.ffs2_din);
}
/*
* To interlock with ffs_sync().
*/
genfs_node_destroy(vp);
mutex_enter(&vp->v_interlock);
data = vp->v_data;
vp->v_data = NULL;
mutex_exit(&vp->v_interlock);
/*
* XXX MFS ends up here, too, to free an inode. Should we create
* XXX a separate pool for MFS inodes?
*/
pool_cache_put(ffs_inode_cache, data);
fstrans_done(mp);
return (0);
}
#if 0
int
ffs_getpages(void *v)
{
struct vop_getpages_args /* {
struct vnode *a_vp;
voff_t a_offset;
struct vm_page **a_m;
int *a_count;
int a_centeridx;
vm_prot_t a_access_type;
int a_advice;
int a_flags;
} */ *ap = v;
struct vnode *vp = ap->a_vp;
struct inode *ip = VTOI(vp);
struct fs *fs = ip->i_fs;
/*
* don't allow a softdep write to create pages for only part of a block.
* the dependency tracking requires that all pages be in memory for
* a block involved in a dependency.
*/
if (ap->a_flags & PGO_OVERWRITE &&
(blkoff(fs, ap->a_offset) != 0 ||
blkoff(fs, *ap->a_count << PAGE_SHIFT) != 0) &&
DOINGSOFTDEP(ap->a_vp)) {
if ((ap->a_flags & PGO_LOCKED) == 0) {
mutex_exit(&vp->v_interlock);
}
return EINVAL;
}
return genfs_getpages(v);
}
#endif
/*
* Return the last logical file offset that should be written for this file
* if we're doing a write that ends at "size".
*/
void
ffs_gop_size(struct vnode *vp, off_t size, off_t *eobp, int flags)
{
struct inode *ip = VTOI(vp);
struct fs *fs = ip->i_fs;
daddr_t olbn, nlbn;
olbn = lblkno(fs, ip->i_size);
nlbn = lblkno(fs, size);
if (nlbn < NDADDR && olbn <= nlbn) {
*eobp = fragroundup(fs, size);
} else {
*eobp = blkroundup(fs, size);
}
}
int
ffs_openextattr(void *v)
{
struct vop_openextattr_args /* {
struct vnode *a_vp;
kauth_cred_t a_cred;
struct proc *a_p;
} */ *ap = v;
struct inode *ip = VTOI(ap->a_vp);
struct fs *fs = ip->i_fs;
/* Not supported for UFS1 file systems. */
if (fs->fs_magic == FS_UFS1_MAGIC)
return (EOPNOTSUPP);
/* XXX Not implemented for UFS2 file systems. */
return (EOPNOTSUPP);
}
int
ffs_closeextattr(void *v)
{
struct vop_closeextattr_args /* {
struct vnode *a_vp;
int a_commit;
kauth_cred_t a_cred;
struct proc *a_p;
} */ *ap = v;
struct inode *ip = VTOI(ap->a_vp);
struct fs *fs = ip->i_fs;
/* Not supported for UFS1 file systems. */
if (fs->fs_magic == FS_UFS1_MAGIC)
return (EOPNOTSUPP);
/* XXX Not implemented for UFS2 file systems. */
return (EOPNOTSUPP);
}
int
ffs_getextattr(void *v)
{
struct vop_getextattr_args /* {
struct vnode *a_vp;
int a_attrnamespace;
const char *a_name;
struct uio *a_uio;
size_t *a_size;
kauth_cred_t a_cred;
struct proc *a_p;
} */ *ap = v;
struct vnode *vp = ap->a_vp;
struct inode *ip = VTOI(vp);
struct fs *fs = ip->i_fs;
if (fs->fs_magic == FS_UFS1_MAGIC) {
#ifdef UFS_EXTATTR
int error;
fstrans_start(vp->v_mount, FSTRANS_SHARED);
error = ufs_getextattr(ap);
fstrans_done(vp->v_mount);
return error;
#else
return (EOPNOTSUPP);
#endif
}
/* XXX Not implemented for UFS2 file systems. */
return (EOPNOTSUPP);
}
int
ffs_setextattr(void *v)
{
struct vop_setextattr_args /* {
struct vnode *a_vp;
int a_attrnamespace;
const char *a_name;
struct uio *a_uio;
kauth_cred_t a_cred;
struct proc *a_p;
} */ *ap = v;
struct vnode *vp = ap->a_vp;
struct inode *ip = VTOI(vp);
struct fs *fs = ip->i_fs;
if (fs->fs_magic == FS_UFS1_MAGIC) {
#ifdef UFS_EXTATTR
int error;
fstrans_start(vp->v_mount, FSTRANS_SHARED);
error = ufs_setextattr(ap);
fstrans_done(vp->v_mount);
return error;
#else
return (EOPNOTSUPP);
#endif
}
/* XXX Not implemented for UFS2 file systems. */
return (EOPNOTSUPP);
}
int
ffs_listextattr(void *v)
{
struct vop_listextattr_args /* {
struct vnode *a_vp;
int a_attrnamespace;
struct uio *a_uio;
size_t *a_size;
kauth_cred_t a_cred;
struct proc *a_p;
} */ *ap = v;
struct inode *ip = VTOI(ap->a_vp);
struct fs *fs = ip->i_fs;
/* Not supported for UFS1 file systems. */
if (fs->fs_magic == FS_UFS1_MAGIC)
return (EOPNOTSUPP);
/* XXX Not implemented for UFS2 file systems. */
return (EOPNOTSUPP);
}
int
ffs_deleteextattr(void *v)
{
struct vop_deleteextattr_args /* {
struct vnode *a_vp;
int a_attrnamespace;
kauth_cred_t a_cred;
struct proc *a_p;
} */ *ap = v;
struct vnode *vp = ap->a_vp;
struct inode *ip = VTOI(vp);
struct fs *fs = ip->i_fs;
if (fs->fs_magic == FS_UFS1_MAGIC) {
#ifdef UFS_EXTATTR
int error;
fstrans_start(vp->v_mount, FSTRANS_SHARED);
error = ufs_deleteextattr(ap);
fstrans_done(vp->v_mount);
return error;
#else
return (EOPNOTSUPP);
#endif
}
/* XXX Not implemented for UFS2 file systems. */
return (EOPNOTSUPP);
}
/*
* Lock the node.
*/
int
ffs_lock(void *v)
{
struct vop_lock_args /* {
struct vnode *a_vp;
int a_flags;
} */ *ap = v;
struct vnode *vp = ap->a_vp;
struct mount *mp = vp->v_mount;
struct lock *lkp;
int flags = ap->a_flags;
int result;
/*
* Fake lock during file system suspension.
*/
if ((vp->v_type == VREG || vp->v_type == VDIR) &&
fstrans_is_owner(mp) &&
fstrans_getstate(mp) == FSTRANS_SUSPENDING) {
if ((flags & LK_INTERLOCK) != 0)
mutex_exit(&vp->v_interlock);
return 0;
}
KASSERT((flags & ~(LK_SHARED | LK_EXCLUSIVE | LK_SLEEPFAIL |
LK_INTERLOCK | LK_NOWAIT | LK_CANRECURSE)) == 0);
for (;;) {
if ((flags & LK_INTERLOCK) == 0) {
mutex_enter(&vp->v_interlock);
flags |= LK_INTERLOCK;
}
lkp = vp->v_vnlock;
result = lockmgr(lkp, flags, &vp->v_interlock);
if (lkp == vp->v_vnlock || result != 0)
return result;
/*
* Apparent success, except that the vnode mutated between
* snapshot file vnode and regular file vnode while this
* thread slept. The lock currently held is not the right
* lock. Release it, and try to get the new lock.
*/
(void) lockmgr(lkp, LK_RELEASE, NULL);
flags &= ~LK_INTERLOCK;
}
}
/*
* Unlock the node.
*/
int
ffs_unlock(void *v)
{
struct vop_unlock_args /* {
struct vnode *a_vp;
int a_flags;
} */ *ap = v;
struct vnode *vp = ap->a_vp;
struct mount *mp = vp->v_mount;
/*
* Fake unlock during file system suspension.
*/
if ((vp->v_type == VREG || vp->v_type == VDIR) &&
fstrans_is_owner(mp) &&
fstrans_getstate(mp) == FSTRANS_SUSPENDING) {
if ((ap->a_flags & LK_INTERLOCK) != 0)
mutex_exit(&vp->v_interlock);
return 0;
}
return (lockmgr(vp->v_vnlock, ap->a_flags | LK_RELEASE,
&vp->v_interlock));
}
/*
* Return whether or not the node is locked.
*/
int
ffs_islocked(void *v)
{
struct vop_islocked_args /* {
struct vnode *a_vp;
} */ *ap = v;
struct vnode *vp = ap->a_vp;
return (lockstatus(vp->v_vnlock));
}
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