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* Copyright (C) 2005-2008 Junjiro Okajima
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* This program, aufs is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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* debug print functions
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* $Id: debug.c,v 1.2 2008/04/21 01:33:00 sfjro Exp $
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//#include <linux/errno.h>
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atomic_t au_cond = ATOMIC_INIT(0);
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char *au_plevel = KERN_DEBUG;
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#define dpri(fmt, arg...) do { \
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printk("%s" fmt, au_plevel, ##arg); \
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/* ---------------------------------------------------------------------- */
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void au_dpri_whlist(struct au_nhash *whlist)
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struct hlist_head *head;
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struct au_vdir_wh *tpos;
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struct hlist_node *pos;
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for (i = 0; i < AuSize_NHASH; i++) {
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head = whlist->heads + i;
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hlist_for_each_entry(tpos, pos, head, wh_hash)
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dpri("b%d, %.*s, %d\n",
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tpos->wh_str.len, tpos->wh_str.name,
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void au_dpri_vdir(struct au_vdir *vdir)
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union au_vdir_deblk_p p;
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if (!vdir || IS_ERR(vdir)) {
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dpri("err %ld\n", PTR_ERR(vdir));
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dpri("nblk %d, deblk %p, last{%d, %p}, ver %lu\n",
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vdir->vd_nblk, vdir->vd_deblk,
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vdir->vd_last.i, vdir->vd_last.p.p, vdir->vd_version);
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for (i = 0; i < vdir->vd_nblk; i++) {
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p.deblk = vdir->vd_deblk[i];
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dpri("[%d]: %p\n", i, o);
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for (j = 0; j < 8; j++) {
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dpri("%p(+%d) {%02x %02x %02x %02x %02x %02x %02x %02x "
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"%02x %02x %02x %02x %02x %02x %02x %02x}\n",
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p.p[0], p.p[1], p.p[2], p.p[3],
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p.p[4], p.p[5], p.p[6], p.p[7],
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p.p[8], p.p[9], p.p[10], p.p[11],
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p.p[12], p.p[13], p.p[14], p.p[15]);
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static int do_pri_inode(aufs_bindex_t bindex, struct inode *inode,
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if (!inode || IS_ERR(inode)) {
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dpri("i%d: err %ld\n", bindex, PTR_ERR(inode));
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/* the type of i_blocks depends upon CONFIG_LSF */
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BUILD_BUG_ON(sizeof(inode->i_blocks) != sizeof(unsigned long)
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&& sizeof(inode->i_blocks) != sizeof(u64));
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n = (void *)wh->d_name.name;
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ntfy = au_test_inotify(inode);
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dpri("i%d: i%lu, %s, cnt %d, nl %u, 0%o, ntfy %d, sz %Lu, blk %Lu,"
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" ct %Ld, np %lu, st 0x%lx, f 0x%x, g %x%s%.*s\n",
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inode->i_ino, inode->i_sb ? au_sbtype(inode->i_sb) : "??",
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atomic_read(&inode->i_count), inode->i_nlink, inode->i_mode,
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i_size_read(inode), (u64)inode->i_blocks,
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timespec_to_ns(&inode->i_ctime) & 0x0ffff,
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inode->i_mapping ? inode->i_mapping->nrpages : 0,
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inode->i_state, inode->i_flags, inode->i_generation,
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l ? ", wh " : "", l, n);
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void au_dpri_inode(struct inode *inode)
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struct au_iinfo *iinfo;
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aufs_bindex_t bindex;
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err = do_pri_inode(-1, inode, NULL);
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if (err || !au_test_aufs(inode->i_sb))
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iinfo = au_ii(inode);
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dpri("i-1: bstart %d, bend %d, gen %d\n",
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iinfo->ii_bstart, iinfo->ii_bend, au_iigen(inode));
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if (iinfo->ii_bstart < 0)
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for (bindex = iinfo->ii_bstart; bindex <= iinfo->ii_bend; bindex++)
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do_pri_inode(bindex, iinfo->ii_hinode[0 + bindex].hi_inode,
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iinfo->ii_hinode[0 + bindex].hi_whdentry);
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static int do_pri_dentry(aufs_bindex_t bindex, struct dentry *dentry,
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struct list_head *intent)
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struct dentry *wh = NULL;
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if (!dentry || IS_ERR(dentry)) {
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dpri("d%d: err %ld\n", bindex, PTR_ERR(dentry));
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/* do not call dget_parent() here */
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dpri("d%d: %.*s/%.*s, %s, cnt %d, flags 0x%x, intent %d\n",
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AuDLNPair(dentry->d_parent), AuDLNPair(dentry),
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dentry->d_sb ? au_sbtype(dentry->d_sb) : "??",
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atomic_read(&dentry->d_count), dentry->d_flags, !!intent);
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if (bindex >= 0 && dentry->d_inode && au_test_aufs(dentry->d_sb)) {
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struct au_iinfo *iinfo = au_ii(dentry->d_inode);
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wh = iinfo->ii_hinode[0 + bindex].hi_whdentry;
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do_pri_inode(bindex, dentry->d_inode, wh);
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static struct list_head *au_dbg_h_intent(struct au_dinfo *dinfo,
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aufs_bindex_t bindex)
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#ifdef CONFIG_AUFS_BR_NFS
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return dinfo->di_hdentry[0 + bindex].hd_intent_list;
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void au_dpri_dentry(struct dentry *dentry)
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struct au_dinfo *dinfo;
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aufs_bindex_t bindex;
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err = do_pri_dentry(-1, dentry, NULL);
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if (err || !au_test_aufs(dentry->d_sb))
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dinfo = au_di(dentry);
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dpri("d-1: bstart %d, bend %d, bwh %d, bdiropq %d, gen %d\n",
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dinfo->di_bstart, dinfo->di_bend,
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dinfo->di_bwh, dinfo->di_bdiropq, au_digen(dentry));
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if (dinfo->di_bstart < 0)
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for (bindex = dinfo->di_bstart; bindex <= dinfo->di_bend; bindex++)
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do_pri_dentry(bindex, dinfo->di_hdentry[0 + bindex].hd_dentry,
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au_dbg_h_intent(dinfo, bindex));
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static int do_pri_file(aufs_bindex_t bindex, struct file *file)
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if (!file || IS_ERR(file)) {
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dpri("f%d: err %ld\n", bindex, PTR_ERR(file));
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&& au_test_aufs(file->f_dentry->d_sb)
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snprintf(a, sizeof(a), ", mmapped %d", au_test_mmapped(file));
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dpri("f%d: mode 0x%x, flags 0%o, cnt %d, pos %Lu%s\n",
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bindex, file->f_mode, file->f_flags, file_count(file),
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do_pri_dentry(bindex, file->f_dentry, NULL);
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void au_dpri_file(struct file *file)
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struct au_finfo *finfo;
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aufs_bindex_t bindex;
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err = do_pri_file(-1, file);
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if (err || !file->f_dentry || !au_test_aufs(file->f_dentry->d_sb))
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if (finfo->fi_bstart < 0)
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for (bindex = finfo->fi_bstart; bindex <= finfo->fi_bend; bindex++) {
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//dpri("bindex %d\n", bindex);
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hf = finfo->fi_hfile + bindex;
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do_pri_file(bindex, hf ? hf->hf_file : NULL);
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static int do_pri_br(aufs_bindex_t bindex, struct au_branch *br)
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struct vfsmount *mnt;
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struct super_block *sb;
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if (!br || IS_ERR(br)
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|| !(mnt = br->br_mnt) || IS_ERR(mnt)
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|| !(sb = mnt->mnt_sb) || IS_ERR(sb)) {
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dpri("s%d: err %ld\n", bindex, PTR_ERR(br));
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dpri("s%d: {perm 0x%x, cnt %d}, "
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"%s, flags 0x%lx, cnt(BIAS) %d, active %d, xino %d\n",
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bindex, br->br_perm, au_br_count(br),
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au_sbtype(sb), sb->s_flags, sb->s_count - S_BIAS,
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atomic_read(&sb->s_active), !!br->br_xino);
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void au_dpri_sb(struct super_block *sb)
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struct au_sbinfo *sbinfo;
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aufs_bindex_t bindex;
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struct vfsmount mnt = { .mnt_sb = sb };
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struct au_branch fake = {
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.br_count = ATOMIC_INIT(0),
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atomic_set(&fake.br_count, 0);
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smp_mb(); /* atomic_set */
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err = do_pri_br(-1, &fake);
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dpri("dev 0x%x\n", sb->s_dev);
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if (err || !au_test_aufs(sb))
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for (bindex = 0; bindex <= sbinfo->si_bend; bindex++) {
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//dpri("bindex %d\n", bindex);
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do_pri_br(bindex, sbinfo->si_branch[0 + bindex]);
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/* ---------------------------------------------------------------------- */
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void au_dbg_sleep(int sec)
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static DECLARE_WAIT_QUEUE_HEAD(wq);
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wait_event_timeout(wq, 0, sec * HZ);
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/* ---------------------------------------------------------------------- */
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void au_debug_sbinfo_init(struct au_sbinfo *sbinfo)
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au_opt_set_udba(sbinfo->si_mntflags, UDBA_INOTIFY);
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au_opt_set(sbinfo->si_mntflags, DLGT);
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au_opt_clr(sbinfo->si_mntflags, PLINK);
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au_opt_clr(sbinfo->si_mntflags, XINO);
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au_opt_clr(sbinfo->si_mntflags, REFROF);
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int __init au_debug_init(void)
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aufs_bindex_t bindex;
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struct au_vdir_destr destr;
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AuDebugOn(bindex >= 0);
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AuDebugOn(destr.len < NAME_MAX);
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#ifdef CONFIG_4KSTACKS
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AuWarn("CONFIG_4KSTACKS is defined.\n");
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#if 0 // verbose debug
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struct au_branch *br;
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struct au_hinode *hi;
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struct au_sbinfo *si;
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struct au_vdir_destr *destr;
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struct au_vdir_de *de;
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struct au_vdir_wh *wh;
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"id %d, perm %d, mnt %d, count %d, "
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"wh_sem %d, wh %d, run %d, plink %d, "
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offsetof(typeof(*u.br), br_xino),
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offsetof(typeof(*u.br), br_id),
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offsetof(typeof(*u.br), br_perm),
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offsetof(typeof(*u.br), br_mnt),
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offsetof(typeof(*u.br), br_count),
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offsetof(typeof(*u.br), br_wh_rwsem),
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offsetof(typeof(*u.br), br_wh),
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offsetof(typeof(*u.br), br_wh_running),
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offsetof(typeof(*u.br), br_plink),
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offsetof(typeof(*u.br), br_xino_upper),
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offsetof(typeof(*u.br), br_xino_running),
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offsetof(typeof(*u.br), br_bytes),
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offsetof(typeof(*u.br), br_generation),
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offsetof(typeof(*u.br), br_sabr),
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pr_info("di{gen %d, rwsem %d, bstart %d, bend %d, bwh %d, "
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"bdiropq %d, hdentry %d} %d\n",
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offsetof(typeof(*u.di), di_generation),
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offsetof(typeof(*u.di), di_rwsem),
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offsetof(typeof(*u.di), di_bstart),
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offsetof(typeof(*u.di), di_bend),
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offsetof(typeof(*u.di), di_bwh),
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offsetof(typeof(*u.di), di_bdiropq),
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offsetof(typeof(*u.di), di_hdentry),
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pr_info("fi{gen %d, rwsem %d, hfile %d, bstart %d, bend %d, "
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"h_vm_ops %d, vdir_cach %d} %d\n",
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offsetof(typeof(*u.fi), fi_generation),
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offsetof(typeof(*u.fi), fi_rwsem),
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offsetof(typeof(*u.fi), fi_hfile),
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offsetof(typeof(*u.fi), fi_bstart),
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offsetof(typeof(*u.fi), fi_bend),
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offsetof(typeof(*u.fi), fi_h_vm_ops),
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offsetof(typeof(*u.fi), fi_vdir_cache),
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pr_info("ii{gen %d, hsb %d, "
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"rwsem %d, bstart %d, bend %d, hinode %d, vdir %d} "
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offsetof(typeof(*u.ii), ii_generation),
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offsetof(typeof(*u.ii), ii_hsb1),
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offsetof(typeof(*u.ii), ii_rwsem),
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offsetof(typeof(*u.ii), ii_bstart),
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offsetof(typeof(*u.ii), ii_bend),
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offsetof(typeof(*u.ii), ii_hinode),
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offsetof(typeof(*u.ii), ii_vdir),
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pr_info("hi{inode %d, id %d, notify %d, wh %d} %d\n",
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offsetof(typeof(*u.hi), hi_inode),
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offsetof(typeof(*u.hi), hi_id),
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offsetof(typeof(*u.hi), hi_notify),
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offsetof(typeof(*u.hi), hi_whdentry),
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pr_info("si{nwt %d, rwsem %d, gen %d, stat %d, "
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"bend %d, last id %d, br %d, "
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"cpup %d, creat %d, ops %d, ops %d, "
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"xread %d, xwrite %d, xib %d, xmtx %d, buf %d, "
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"xlast %d, xnext %d, "
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"pl_lock %d, pl %d, "
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//"lvma_l %d, lvma %d"
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offsetof(typeof(*u.si), si_nowait),
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offsetof(typeof(*u.si), si_rwsem),
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offsetof(typeof(*u.si), si_generation),
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offsetof(typeof(*u.si), au_si_status),
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offsetof(typeof(*u.si), si_bend),
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offsetof(typeof(*u.si), si_last_br_id),
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offsetof(typeof(*u.si), si_branch),
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offsetof(typeof(*u.si), si_wbr_copyup),
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offsetof(typeof(*u.si), si_wbr_create),
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offsetof(typeof(*u.si), si_wbr_copyup_ops),
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offsetof(typeof(*u.si), si_wbr_create_ops),
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offsetof(typeof(*u.si), si_wbr_rr_next),
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offsetof(typeof(*u.si), si_wbr_mfs),
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offsetof(typeof(*u.si), si_mntflags),
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offsetof(typeof(*u.si), si_xread),
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offsetof(typeof(*u.si), si_xwrite),
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offsetof(typeof(*u.si), si_xib),
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offsetof(typeof(*u.si), si_xib_mtx),
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offsetof(typeof(*u.si), si_xib_buf),
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offsetof(typeof(*u.si), si_xib_last_pindex),
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offsetof(typeof(*u.si), si_xib_next_bit),
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offsetof(typeof(*u.si), si_rdcache),
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offsetof(typeof(*u.si), si_dirwh),
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offsetof(typeof(*u.si), si_plink_lock),
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offsetof(typeof(*u.si), si_plink),
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offsetof(typeof(*u.si), si_mnt),
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offsetof(typeof(*u.si), si_list),
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offsetof(typeof(*u.si), si_sa),
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//offsetof(typeof(*u.si), si_lvma_lock),
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//offsetof(typeof(*u.si), si_lvma),
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pr_info("destr{len %d, name %d} %d\n",
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offsetof(typeof(*u.destr), len),
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offsetof(typeof(*u.destr), name),
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pr_info("de{ino %d, type %d, str %d} %d\n",
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offsetof(typeof(*u.de), de_ino),
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offsetof(typeof(*u.de), de_type),
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offsetof(typeof(*u.de), de_str),
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pr_info("wh{hash %d, bindex %d, str %d} %d\n",
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offsetof(typeof(*u.wh), wh_hash),
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offsetof(typeof(*u.wh), wh_bindex),
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offsetof(typeof(*u.wh), wh_str),
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pr_info("vd{deblk %d, nblk %d, last %d, ver %d, jiffy %d} %d\n",
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offsetof(typeof(*u.vd), vd_deblk),
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offsetof(typeof(*u.vd), vd_nblk),
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offsetof(typeof(*u.vd), vd_last),
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offsetof(typeof(*u.vd), vd_version),
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offsetof(typeof(*u.vd), vd_jiffy),