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-rw-r--r--sys/ufs/lfs/lfs_vnops.c487
1 files changed, 487 insertions, 0 deletions
diff --git a/sys/ufs/lfs/lfs_vnops.c b/sys/ufs/lfs/lfs_vnops.c
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+++ b/sys/ufs/lfs/lfs_vnops.c
@@ -0,0 +1,487 @@
+/*
+ * Copyright (c) 1986, 1989, 1991, 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. 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.
+ *
+ * @(#)lfs_vnops.c 8.5 (Berkeley) 12/30/93
+ */
+
+#include <sys/param.h>
+#include <sys/systm.h>
+#include <sys/namei.h>
+#include <sys/resourcevar.h>
+#include <sys/kernel.h>
+#include <sys/file.h>
+#include <sys/stat.h>
+#include <sys/buf.h>
+#include <sys/proc.h>
+#include <sys/conf.h>
+#include <sys/mount.h>
+#include <sys/vnode.h>
+#include <sys/malloc.h>
+
+#include <vm/vm.h>
+
+#include <miscfs/specfs/specdev.h>
+#include <miscfs/fifofs/fifo.h>
+
+#include <ufs/ufs/quota.h>
+#include <ufs/ufs/inode.h>
+#include <ufs/ufs/dir.h>
+#include <ufs/ufs/ufsmount.h>
+#include <ufs/ufs/ufs_extern.h>
+
+#include <ufs/lfs/lfs.h>
+#include <ufs/lfs/lfs_extern.h>
+
+/* Global vfs data structures for lfs. */
+int (**lfs_vnodeop_p)();
+struct vnodeopv_entry_desc lfs_vnodeop_entries[] = {
+ { &vop_default_desc, vn_default_error },
+ { &vop_lookup_desc, ufs_lookup }, /* lookup */
+ { &vop_create_desc, ufs_create }, /* create */
+ { &vop_mknod_desc, ufs_mknod }, /* mknod */
+ { &vop_open_desc, ufs_open }, /* open */
+ { &vop_close_desc, lfs_close }, /* close */
+ { &vop_access_desc, ufs_access }, /* access */
+ { &vop_getattr_desc, lfs_getattr }, /* getattr */
+ { &vop_setattr_desc, ufs_setattr }, /* setattr */
+ { &vop_read_desc, lfs_read }, /* read */
+ { &vop_write_desc, lfs_write }, /* write */
+ { &vop_ioctl_desc, ufs_ioctl }, /* ioctl */
+ { &vop_select_desc, ufs_select }, /* select */
+ { &vop_mmap_desc, ufs_mmap }, /* mmap */
+ { &vop_fsync_desc, lfs_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, lfs_inactive }, /* inactive */
+ { &vop_reclaim_desc, ufs_reclaim }, /* reclaim */
+ { &vop_lock_desc, ufs_lock }, /* lock */
+ { &vop_unlock_desc, ufs_unlock }, /* unlock */
+ { &vop_bmap_desc, ufs_bmap }, /* bmap */
+ { &vop_strategy_desc, ufs_strategy }, /* strategy */
+ { &vop_print_desc, ufs_print }, /* print */
+ { &vop_islocked_desc, ufs_islocked }, /* islocked */
+ { &vop_pathconf_desc, ufs_pathconf }, /* pathconf */
+ { &vop_advlock_desc, ufs_advlock }, /* advlock */
+ { &vop_blkatoff_desc, lfs_blkatoff }, /* blkatoff */
+ { &vop_valloc_desc, lfs_valloc }, /* valloc */
+ { &vop_vfree_desc, lfs_vfree }, /* vfree */
+ { &vop_truncate_desc, lfs_truncate }, /* truncate */
+ { &vop_update_desc, lfs_update }, /* update */
+ { &vop_bwrite_desc, lfs_bwrite }, /* bwrite */
+ { (struct vnodeop_desc*)NULL, (int(*)())NULL }
+};
+struct vnodeopv_desc lfs_vnodeop_opv_desc =
+ { &lfs_vnodeop_p, lfs_vnodeop_entries };
+
+int (**lfs_specop_p)();
+struct vnodeopv_entry_desc lfs_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, lfs_getattr }, /* getattr */
+ { &vop_setattr_desc, ufs_setattr }, /* setattr */
+ { &vop_read_desc, ufsspec_read }, /* read */
+ { &vop_write_desc, ufsspec_write }, /* write */
+ { &vop_ioctl_desc, spec_ioctl }, /* ioctl */
+ { &vop_select_desc, spec_select }, /* select */
+ { &vop_mmap_desc, spec_mmap }, /* mmap */
+ { &vop_fsync_desc, spec_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, lfs_inactive }, /* inactive */
+ { &vop_reclaim_desc, ufs_reclaim }, /* reclaim */
+ { &vop_lock_desc, ufs_lock }, /* lock */
+ { &vop_unlock_desc, ufs_unlock }, /* unlock */
+ { &vop_bmap_desc, spec_bmap }, /* bmap */
+ { &vop_strategy_desc, spec_strategy }, /* strategy */
+ { &vop_print_desc, ufs_print }, /* print */
+ { &vop_islocked_desc, ufs_islocked }, /* islocked */
+ { &vop_pathconf_desc, spec_pathconf }, /* pathconf */
+ { &vop_advlock_desc, spec_advlock }, /* advlock */
+ { &vop_blkatoff_desc, spec_blkatoff }, /* blkatoff */
+ { &vop_valloc_desc, spec_valloc }, /* valloc */
+ { &vop_vfree_desc, lfs_vfree }, /* vfree */
+ { &vop_truncate_desc, spec_truncate }, /* truncate */
+ { &vop_update_desc, lfs_update }, /* update */
+ { &vop_bwrite_desc, lfs_bwrite }, /* bwrite */
+ { (struct vnodeop_desc*)NULL, (int(*)())NULL }
+};
+struct vnodeopv_desc lfs_specop_opv_desc =
+ { &lfs_specop_p, lfs_specop_entries };
+
+#ifdef FIFO
+int (**lfs_fifoop_p)();
+struct vnodeopv_entry_desc lfs_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, lfs_getattr }, /* getattr */
+ { &vop_setattr_desc, ufs_setattr }, /* setattr */
+ { &vop_read_desc, ufsfifo_read }, /* read */
+ { &vop_write_desc, ufsfifo_write }, /* write */
+ { &vop_ioctl_desc, fifo_ioctl }, /* ioctl */
+ { &vop_select_desc, fifo_select }, /* select */
+ { &vop_mmap_desc, fifo_mmap }, /* mmap */
+ { &vop_fsync_desc, fifo_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, lfs_inactive }, /* inactive */
+ { &vop_reclaim_desc, ufs_reclaim }, /* reclaim */
+ { &vop_lock_desc, ufs_lock }, /* lock */
+ { &vop_unlock_desc, ufs_unlock }, /* unlock */
+ { &vop_bmap_desc, fifo_bmap }, /* bmap */
+ { &vop_strategy_desc, fifo_strategy }, /* strategy */
+ { &vop_print_desc, ufs_print }, /* print */
+ { &vop_islocked_desc, ufs_islocked }, /* islocked */
+ { &vop_pathconf_desc, fifo_pathconf }, /* pathconf */
+ { &vop_advlock_desc, fifo_advlock }, /* advlock */
+ { &vop_blkatoff_desc, fifo_blkatoff }, /* blkatoff */
+ { &vop_valloc_desc, fifo_valloc }, /* valloc */
+ { &vop_vfree_desc, lfs_vfree }, /* vfree */
+ { &vop_truncate_desc, fifo_truncate }, /* truncate */
+ { &vop_update_desc, lfs_update }, /* update */
+ { &vop_bwrite_desc, lfs_bwrite }, /* bwrite */
+ { (struct vnodeop_desc*)NULL, (int(*)())NULL }
+};
+struct vnodeopv_desc lfs_fifoop_opv_desc =
+ { &lfs_fifoop_p, lfs_fifoop_entries };
+#endif /* FIFO */
+
+#define LFS_READWRITE
+#include <ufs/ufs/ufs_readwrite.c>
+#undef LFS_READWRITE
+
+/*
+ * Synch an open file.
+ */
+/* ARGSUSED */
+lfs_fsync(ap)
+ struct vop_fsync_args /* {
+ struct vnode *a_vp;
+ struct ucred *a_cred;
+ int a_waitfor;
+ struct proc *a_p;
+ } */ *ap;
+{
+ struct timeval tv;
+
+ tv = time;
+ return (VOP_UPDATE(ap->a_vp, &tv, &tv,
+ ap->a_waitfor == MNT_WAIT ? LFS_SYNC : 0));
+}
+
+/*
+ * These macros are used to bracket UFS directory ops, so that we can
+ * identify all the pages touched during directory ops which need to
+ * be ordered and flushed atomically, so that they may be recovered.
+ */
+#define SET_DIROP(fs) { \
+ if ((fs)->lfs_writer) \
+ tsleep(&(fs)->lfs_dirops, PRIBIO + 1, "lfs_dirop", 0); \
+ ++(fs)->lfs_dirops; \
+ (fs)->lfs_doifile = 1; \
+}
+
+#define SET_ENDOP(fs) { \
+ --(fs)->lfs_dirops; \
+ if (!(fs)->lfs_dirops) \
+ wakeup(&(fs)->lfs_writer); \
+}
+
+#define MARK_VNODE(dvp) (dvp)->v_flag |= VDIROP
+
+int
+lfs_symlink(ap)
+ struct vop_symlink_args /* {
+ struct vnode *a_dvp;
+ struct vnode **a_vpp;
+ struct componentname *a_cnp;
+ struct vattr *a_vap;
+ char *a_target;
+ } */ *ap;
+{
+ int ret;
+
+ SET_DIROP(VTOI(ap->a_dvp)->i_lfs);
+ MARK_VNODE(ap->a_dvp);
+ ret = ufs_symlink(ap);
+ SET_ENDOP(VTOI(ap->a_dvp)->i_lfs);
+ return (ret);
+}
+
+int
+lfs_mknod(ap)
+ struct vop_mknod_args /* {
+ struct vnode *a_dvp;
+ struct vnode **a_vpp;
+ struct componentname *a_cnp;
+ struct vattr *a_vap;
+ } */ *ap;
+{
+ int ret;
+
+ SET_DIROP(VTOI(ap->a_dvp)->i_lfs);
+ MARK_VNODE(ap->a_dvp);
+ ret = ufs_mknod(ap);
+ SET_ENDOP(VTOI(ap->a_dvp)->i_lfs);
+ return (ret);
+}
+
+int
+lfs_create(ap)
+ struct vop_create_args /* {
+ struct vnode *a_dvp;
+ struct vnode **a_vpp;
+ struct componentname *a_cnp;
+ struct vattr *a_vap;
+ } */ *ap;
+{
+ int ret;
+
+ SET_DIROP(VTOI(ap->a_dvp)->i_lfs);
+ MARK_VNODE(ap->a_dvp);
+ ret = ufs_create(ap);
+ SET_ENDOP(VTOI(ap->a_dvp)->i_lfs);
+ return (ret);
+}
+
+int
+lfs_mkdir(ap)
+ struct vop_mkdir_args /* {
+ struct vnode *a_dvp;
+ struct vnode **a_vpp;
+ struct componentname *a_cnp;
+ struct vattr *a_vap;
+ } */ *ap;
+{
+ int ret;
+
+ SET_DIROP(VTOI(ap->a_dvp)->i_lfs);
+ MARK_VNODE(ap->a_dvp);
+ ret = ufs_mkdir(ap);
+ SET_ENDOP(VTOI(ap->a_dvp)->i_lfs);
+ return (ret);
+}
+
+int
+lfs_remove(ap)
+ struct vop_remove_args /* {
+ struct vnode *a_dvp;
+ struct vnode *a_vp;
+ struct componentname *a_cnp;
+ } */ *ap;
+{
+ int ret;
+
+ SET_DIROP(VTOI(ap->a_dvp)->i_lfs);
+ MARK_VNODE(ap->a_dvp);
+ MARK_VNODE(ap->a_vp);
+ ret = ufs_remove(ap);
+ SET_ENDOP(VTOI(ap->a_dvp)->i_lfs);
+ return (ret);
+}
+
+int
+lfs_rmdir(ap)
+ struct vop_rmdir_args /* {
+ struct vnodeop_desc *a_desc;
+ struct vnode *a_dvp;
+ struct vnode *a_vp;
+ struct componentname *a_cnp;
+ } */ *ap;
+{
+ int ret;
+
+ SET_DIROP(VTOI(ap->a_dvp)->i_lfs);
+ MARK_VNODE(ap->a_dvp);
+ MARK_VNODE(ap->a_vp);
+ ret = ufs_rmdir(ap);
+ SET_ENDOP(VTOI(ap->a_dvp)->i_lfs);
+ return (ret);
+}
+
+int
+lfs_link(ap)
+ struct vop_link_args /* {
+ struct vnode *a_vp;
+ struct vnode *a_tdvp;
+ struct componentname *a_cnp;
+ } */ *ap;
+{
+ int ret;
+
+ SET_DIROP(VTOI(ap->a_vp)->i_lfs);
+ MARK_VNODE(ap->a_vp);
+ ret = ufs_link(ap);
+ SET_ENDOP(VTOI(ap->a_vp)->i_lfs);
+ return (ret);
+}
+
+int
+lfs_rename(ap)
+ struct vop_rename_args /* {
+ struct vnode *a_fdvp;
+ struct vnode *a_fvp;
+ struct componentname *a_fcnp;
+ struct vnode *a_tdvp;
+ struct vnode *a_tvp;
+ struct componentname *a_tcnp;
+ } */ *ap;
+{
+ int ret;
+
+ SET_DIROP(VTOI(ap->a_fdvp)->i_lfs);
+ MARK_VNODE(ap->a_fdvp);
+ MARK_VNODE(ap->a_tdvp);
+ ret = ufs_rename(ap);
+ SET_ENDOP(VTOI(ap->a_fdvp)->i_lfs);
+ return (ret);
+}
+/* XXX hack to avoid calling ITIMES in getattr */
+int
+lfs_getattr(ap)
+ struct vop_getattr_args /* {
+ struct vnode *a_vp;
+ struct vattr *a_vap;
+ struct ucred *a_cred;
+ struct proc *a_p;
+ } */ *ap;
+{
+ register struct vnode *vp = ap->a_vp;
+ register struct inode *ip = VTOI(vp);
+ register struct vattr *vap = ap->a_vap;
+ /*
+ * Copy from inode table
+ */
+ vap->va_fsid = ip->i_dev;
+ vap->va_fileid = ip->i_number;
+ vap->va_mode = ip->i_mode & ~IFMT;
+ vap->va_nlink = ip->i_nlink;
+ vap->va_uid = ip->i_uid;
+ vap->va_gid = ip->i_gid;
+ vap->va_rdev = (dev_t)ip->i_rdev;
+ vap->va_size = ip->i_din.di_size;
+ vap->va_atime = ip->i_atime;
+ vap->va_mtime = ip->i_mtime;
+ vap->va_ctime = ip->i_ctime;
+ vap->va_flags = ip->i_flags;
+ vap->va_gen = ip->i_gen;
+ /* this doesn't belong here */
+ if (vp->v_type == VBLK)
+ vap->va_blocksize = BLKDEV_IOSIZE;
+ else if (vp->v_type == VCHR)
+ vap->va_blocksize = MAXBSIZE;
+ else
+ vap->va_blocksize = vp->v_mount->mnt_stat.f_iosize;
+ vap->va_bytes = dbtob(ip->i_blocks);
+ vap->va_type = vp->v_type;
+ vap->va_filerev = ip->i_modrev;
+ return (0);
+}
+/*
+ * Close called
+ *
+ * XXX -- we were using ufs_close, but since it updates the
+ * times on the inode, we might need to bump the uinodes
+ * count.
+ */
+/* ARGSUSED */
+int
+lfs_close(ap)
+ struct vop_close_args /* {
+ struct vnode *a_vp;
+ int a_fflag;
+ struct ucred *a_cred;
+ struct proc *a_p;
+ } */ *ap;
+{
+ register struct vnode *vp = ap->a_vp;
+ register struct inode *ip = VTOI(vp);
+ int mod;
+
+ if (vp->v_usecount > 1 && !(ip->i_flag & IN_LOCKED)) {
+ mod = ip->i_flag & IN_MODIFIED;
+ ITIMES(ip, &time, &time);
+ if (!mod && ip->i_flag & IN_MODIFIED)
+ ip->i_lfs->lfs_uinodes++;
+ }
+ return (0);
+}
+
+/*
+ * Stub inactive routine that avoid calling ufs_inactive in some cases.
+ */
+int lfs_no_inactive = 0;
+
+int
+lfs_inactive(ap)
+ struct vop_inactive_args /* {
+ struct vnode *a_vp;
+ } */ *ap;
+{
+
+ if (lfs_no_inactive)
+ return (0);
+ return (ufs_inactive(ap));
+}
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