static void au_ren_refresh(struct au_ren_args *a)
{
aufs_bindex_t bend, bindex;
struct dentry *d, *h_d;
struct inode *i, *h_i;
struct super_block *sb;
d = a->dst_dentry;
d_drop(d);
if (a->h_dst)
/* already dget-ed by au_ren_or_cpup() */
au_set_h_dptr(d, a->btgt, a->h_dst);
i = a->dst_inode;
if (i) {
if (!au_ftest_ren(a->flags, ISDIR))
vfsub_drop_nlink(i);
else {
vfsub_dead_dir(i);
au_cpup_attr_timesizes(i);
}
au_update_dbrange(d, /*do_put_zero*/1);
} else {
bend = a->btgt;
for (bindex = au_dbstart(d); bindex < bend; bindex++)
au_set_h_dptr(d, bindex, NULL);
bend = au_dbend(d);
for (bindex = a->btgt + 1; bindex <= bend; bindex++)
au_set_h_dptr(d, bindex, NULL);
au_update_dbrange(d, /*do_put_zero*/0);
}
d = a->src_dentry;
au_set_dbwh(d, -1);
bend = au_dbend(d);
for (bindex = a->btgt + 1; bindex <= bend; bindex++) {
h_d = au_h_dptr(d, bindex);
if (h_d)
au_set_h_dptr(d, bindex, NULL);
}
au_set_dbend(d, a->btgt);
sb = d->d_sb;
i = a->src_inode;
if (au_opt_test(au_mntflags(sb), PLINK) && au_plink_test(i))
return; /* success */
bend = au_ibend(i);
for (bindex = a->btgt + 1; bindex <= bend; bindex++) {
h_i = au_h_iptr(i, bindex);
if (h_i) {
au_xino_write(sb, bindex, h_i->i_ino, /*ino*/0);
/* ignore this error */
au_set_h_iptr(i, bindex, NULL, 0);
}
}
au_set_ibend(i, a->btgt);
}
/*
* copy-down the file and unlink the bsrc file.
* - unlink the bdst whout if exist
* - copy-down the file (with whtmp name and rename)
* - unlink the bsrc file
*/
static int au_do_mvdown(const unsigned char dmsg, struct au_mvd_args *a)
{
int err;
err = au_do_mkdir(dmsg, a);
if (!err)
err = au_do_lock(dmsg, a);
if (unlikely(err))
goto out;
/*
* do not revert the activities we made on bdst since they should be
* harmless in aufs.
*/
err = au_do_cpdown(dmsg, a);
if (!err)
err = au_do_unlink_wh(dmsg, a);
if (!err && !(a->mvdown.flags & AUFS_MVDOWN_KUPPER))
err = au_do_unlink(dmsg, a);
if (unlikely(err))
goto out_unlock;
AuDbg("%pd2, 0x%x, %d --> %d\n",
a->dentry, a->mvdown.flags, a->mvd_bsrc, a->mvd_bdst);
if (find_lower_writable(a) < 0)
a->mvdown.flags |= AUFS_MVDOWN_BOTTOM;
if (a->mvdown.flags & AUFS_MVDOWN_STFS)
au_do_stfs(dmsg, a);
/* maintain internal array */
if (!(a->mvdown.flags & AUFS_MVDOWN_KUPPER)) {
au_set_h_dptr(a->dentry, a->mvd_bsrc, NULL);
au_set_dbstart(a->dentry, a->mvd_bdst);
au_set_h_iptr(a->inode, a->mvd_bsrc, NULL, /*flags*/0);
au_set_ibstart(a->inode, a->mvd_bdst);
}
if (au_dbend(a->dentry) < a->mvd_bdst)
au_set_dbend(a->dentry, a->mvd_bdst);
if (au_ibend(a->inode) < a->mvd_bdst)
au_set_ibend(a->inode, a->mvd_bdst);
out_unlock:
au_do_unlock(dmsg, a);
out:
AuTraceErr(err);
return err;
}
static int au_cpdown_dir(struct dentry *dentry, aufs_bindex_t bdst,
struct dentry *h_parent, void *arg)
{
int err, rerr;
aufs_bindex_t bopq, bstart;
struct path h_path;
struct dentry *parent;
struct inode *h_dir, *h_inode, *inode, *dir;
struct au_cpdown_dir_args *args = arg;
bstart = au_dbstart(dentry);
/* dentry is di-locked */
parent = dget_parent(dentry);
dir = parent->d_inode;
h_dir = h_parent->d_inode;
AuDebugOn(h_dir != au_h_iptr(dir, bdst));
IMustLock(h_dir);
err = au_lkup_neg(dentry, bdst);
if (unlikely(err < 0))
goto out;
h_path.dentry = au_h_dptr(dentry, bdst);
h_path.mnt = au_sbr_mnt(dentry->d_sb, bdst);
err = vfsub_sio_mkdir(au_h_iptr(dir, bdst), &h_path,
S_IRWXU | S_IRUGO | S_IXUGO);
if (unlikely(err))
goto out_put;
au_fset_cpdown(args->flags, MADE_DIR);
bopq = au_dbdiropq(dentry);
au_fclr_cpdown(args->flags, WHED);
au_fclr_cpdown(args->flags, DIROPQ);
if (au_dbwh(dentry) == bdst)
au_fset_cpdown(args->flags, WHED);
if (!au_ftest_cpdown(args->flags, PARENT_OPQ) && bopq <= bdst)
au_fset_cpdown(args->flags, PARENT_OPQ);
h_inode = h_path.dentry->d_inode;
mutex_lock_nested(&h_inode->i_mutex, AuLsc_I_CHILD);
if (au_ftest_cpdown(args->flags, WHED)) {
err = au_cpdown_dir_opq(dentry, bdst, args);
if (unlikely(err)) {
mutex_unlock(&h_inode->i_mutex);
goto out_dir;
}
}
err = au_cpdown_attr(&h_path, au_h_dptr(dentry, bstart));
mutex_unlock(&h_inode->i_mutex);
if (unlikely(err))
goto out_opq;
if (au_ftest_cpdown(args->flags, WHED)) {
err = au_cpdown_dir_wh(dentry, h_parent, dir, bdst);
if (unlikely(err))
goto out_opq;
}
inode = dentry->d_inode;
if (au_ibend(inode) < bdst)
au_set_ibend(inode, bdst);
au_set_h_iptr(inode, bdst, au_igrab(h_inode),
au_hi_flags(inode, /*isdir*/1));
goto out; /* success */
/* revert */
out_opq:
if (au_ftest_cpdown(args->flags, DIROPQ)) {
mutex_lock_nested(&h_inode->i_mutex, AuLsc_I_CHILD);
rerr = au_diropq_remove(dentry, bdst);
mutex_unlock(&h_inode->i_mutex);
if (unlikely(rerr)) {
AuIOErr("failed removing diropq for %.*s b%d (%d)\n",
AuDLNPair(dentry), bdst, rerr);
err = -EIO;
goto out;
}
}
out_dir:
if (au_ftest_cpdown(args->flags, MADE_DIR)) {
rerr = vfsub_sio_rmdir(au_h_iptr(dir, bdst), &h_path);
if (unlikely(rerr)) {
AuIOErr("failed removing %.*s b%d (%d)\n",
AuDLNPair(dentry), bdst, rerr);
err = -EIO;
}
}
out_put:
au_set_h_dptr(dentry, bdst, NULL);
if (au_dbend(dentry) == bdst)
au_update_dbend(dentry);
out:
dput(parent);
return err;
}
