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); }
int aufs_rmdir(struct inode *dir, struct dentry *dentry) { int err, rmdir_later; aufs_bindex_t bwh, bindex, bstart; struct au_dtime dt; struct au_pin pin; struct inode *inode; struct dentry *parent, *wh_dentry, *h_dentry; struct au_whtmp_rmdir *args; IMustLock(dir); err = aufs_read_lock(dentry, AuLock_DW | AuLock_FLUSH | AuLock_GEN); if (unlikely(err)) goto out; err = au_alive_dir(dentry); if (unlikely(err)) goto out_unlock; inode = dentry->d_inode; IMustLock(inode); err = -ENOTDIR; if (unlikely(!S_ISDIR(inode->i_mode))) goto out_unlock; /* possible? */ err = -ENOMEM; args = au_whtmp_rmdir_alloc(dir->i_sb, GFP_NOFS); if (unlikely(!args)) goto out_unlock; parent = dentry->d_parent; /* dir inode is locked */ di_write_lock_parent(parent); err = au_test_empty(dentry, &args->whlist); if (unlikely(err)) goto out_parent; bstart = au_dbstart(dentry); bwh = au_dbwh(dentry); bindex = -1; wh_dentry = lock_hdir_create_wh(dentry, /*isdir*/1, &bindex, &dt, &pin); err = PTR_ERR(wh_dentry); if (IS_ERR(wh_dentry)) goto out_parent; h_dentry = au_h_dptr(dentry, bstart); dget(h_dentry); rmdir_later = 0; if (bindex == bstart) { err = renwh_and_rmdir(dentry, bstart, &args->whlist, dir); if (err > 0) { rmdir_later = err; err = 0; } } else { /* stop monitoring */ au_hn_free(au_hi(inode, bstart)); /* dir inode is locked */ IMustLock(wh_dentry->d_parent->d_inode); err = 0; } if (!err) { vfsub_dead_dir(inode); au_set_dbdiropq(dentry, -1); epilog(dir, dentry, bindex); if (rmdir_later) { au_whtmp_kick_rmdir(dir, bstart, h_dentry, args); args = NULL; } goto out_unpin; /* success */ } /* revert */ AuLabel(revert); if (wh_dentry) { int rerr; rerr = do_revert(err, dir, bindex, bwh, wh_dentry, dentry, &dt); if (rerr) err = rerr; } out_unpin: au_unpin(&pin); dput(wh_dentry); dput(h_dentry); out_parent: di_write_unlock(parent); if (args) au_whtmp_rmdir_free(args); out_unlock: aufs_read_unlock(dentry, AuLock_DW); out: AuTraceErr(err); return err; }