Esempio n. 1
0
int au_opts_remount(struct super_block *sb, struct au_opts *opts)
{
	int err, rerr;
	unsigned char no_dreval;
	struct inode *dir;
	struct au_opt_xino *opt_xino;
	struct au_opt *opt;
	struct au_sbinfo *sbinfo;

	SiMustWriteLock(sb);

	err = 0;
	dir = d_inode(sb->s_root);
	sbinfo = au_sbi(sb);
	opt_xino = NULL;
	opt = opts->opt;
	while (err >= 0 && opt->type != Opt_tail) {
		err = au_opt_simple(sb, opt, opts);
		if (!err)
			err = au_opt_br(sb, opt, opts);
		if (!err)
			err = au_opt_xino(sb, opt, &opt_xino, opts);
		opt++;
	}
	if (err > 0)
		err = 0;
	AuTraceErr(err);
	/* go on even err */

	no_dreval = !!au_ftest_si(sbinfo, NO_DREVAL);
	rerr = au_opts_verify(sb, opts->sb_flags, /*pending*/0);
	if (unlikely(rerr && !err))
		err = rerr;

	if (no_dreval != !!au_ftest_si(sbinfo, NO_DREVAL))
		au_fset_opts(opts->flags, REFRESH_IDOP);

	if (au_ftest_opts(opts->flags, TRUNC_XIB)) {
		rerr = au_xib_trunc(sb);
		if (unlikely(rerr && !err))
			err = rerr;
	}

	/* will be handled by the caller */
	if (!au_ftest_opts(opts->flags, REFRESH)
	    && (opts->given_udba
		|| au_opt_test(sbinfo->si_mntflags, XINO)
		|| au_ftest_opts(opts->flags, REFRESH_IDOP)
		    ))
		au_fset_opts(opts->flags, REFRESH);

	AuDbg("status 0x%x\n", opts->flags);
	return err;
}
Esempio n. 2
0
/*
 * returns tri-state.
 * plus: processed without an error
 * zero: unprocessed
 * minus: error
 */
static int au_opt_br(struct super_block *sb, struct au_opt *opt,
		     struct au_opts *opts)
{
	int err, do_refresh;

	err = 0;
	switch (opt->type) {
	case Opt_append:
		opt->add.bindex = au_sbend(sb) + 1;
		if (opt->add.bindex < 0)
			opt->add.bindex = 0;
		goto add;
	case Opt_prepend:
		opt->add.bindex = 0;
	add:
	case Opt_add:
		err = au_br_add(sb, &opt->add,
				au_ftest_opts(opts->flags, REMOUNT));
		if (!err) {
			err = 1;
			au_fset_opts(opts->flags, REFRESH);
		}
		break;

	case Opt_del:
	case Opt_idel:
		err = au_br_del(sb, &opt->del,
				au_ftest_opts(opts->flags, REMOUNT));
		if (!err) {
			err = 1;
			au_fset_opts(opts->flags, TRUNC_XIB);
			au_fset_opts(opts->flags, REFRESH);
		}
		break;

	case Opt_mod:
	case Opt_imod:
		err = au_br_mod(sb, &opt->mod,
				au_ftest_opts(opts->flags, REMOUNT),
				&do_refresh);
		if (!err) {
			err = 1;
			if (do_refresh)
				au_fset_opts(opts->flags, REFRESH);
		}
		break;
	}

	return err;
}
Esempio n. 3
0
/*
 * returns,
 * plus: processed without an error
 * zero: unprocessed
 */
static int au_opt_simple(struct super_block *sb, struct au_opt *opt,
			 struct au_opts *opts)
{
	int err;
	struct au_sbinfo *sbinfo;

	SiMustWriteLock(sb);

	err = 1; /* handled */
	sbinfo = au_sbi(sb);
	switch (opt->type) {
	case Opt_udba:
		sbinfo->si_mntflags &= ~AuOptMask_UDBA;
		sbinfo->si_mntflags |= opt->udba;
		opts->given_udba |= opt->udba;
		break;

	case Opt_plink:
		au_opt_set(sbinfo->si_mntflags, PLINK);
		break;
	case Opt_noplink:
		if (au_opt_test(sbinfo->si_mntflags, PLINK))
			au_plink_put(sb, /*verbose*/1);
		au_opt_clr(sbinfo->si_mntflags, PLINK);
		break;
	case Opt_list_plink:
		if (au_opt_test(sbinfo->si_mntflags, PLINK))
			au_plink_list(sb);
		break;

	case Opt_dio:
		au_opt_set(sbinfo->si_mntflags, DIO);
		au_fset_opts(opts->flags, REFRESH_DYAOP);
		break;
	case Opt_nodio:
		au_opt_clr(sbinfo->si_mntflags, DIO);
		au_fset_opts(opts->flags, REFRESH_DYAOP);
		break;

	case Opt_diropq_a:
		au_opt_set(sbinfo->si_mntflags, ALWAYS_DIROPQ);
		break;
	case Opt_diropq_w:
		au_opt_clr(sbinfo->si_mntflags, ALWAYS_DIROPQ);
		break;

	case Opt_warn_perm:
		au_opt_set(sbinfo->si_mntflags, WARN_PERM);
		break;
	case Opt_nowarn_perm:
		au_opt_clr(sbinfo->si_mntflags, WARN_PERM);
		break;

	case Opt_refrof:
		au_opt_set(sbinfo->si_mntflags, REFROF);
		break;
	case Opt_norefrof:
		au_opt_clr(sbinfo->si_mntflags, REFROF);
		break;

	case Opt_verbose:
		au_opt_set(sbinfo->si_mntflags, VERBOSE);
		break;
	case Opt_noverbose:
		au_opt_clr(sbinfo->si_mntflags, VERBOSE);
		break;

	case Opt_sum:
		au_opt_set(sbinfo->si_mntflags, SUM);
		break;
	case Opt_wsum:
		au_opt_clr(sbinfo->si_mntflags, SUM);
		au_opt_set(sbinfo->si_mntflags, SUM_W);
	case Opt_nosum:
		au_opt_clr(sbinfo->si_mntflags, SUM);
		au_opt_clr(sbinfo->si_mntflags, SUM_W);
		break;

	case Opt_wbr_create:
		err = au_opt_wbr_create(sb, &opt->wbr_create);
		break;
	case Opt_wbr_copyup:
		sbinfo->si_wbr_copyup = opt->wbr_copyup;
		sbinfo->si_wbr_copyup_ops = au_wbr_copyup_ops + opt->wbr_copyup;
		break;

	case Opt_dirwh:
		sbinfo->si_dirwh = opt->dirwh;
		break;

	case Opt_rdcache:
		sbinfo->si_rdcache
			= msecs_to_jiffies(opt->rdcache * MSEC_PER_SEC);
		break;
	case Opt_rdblk:
		sbinfo->si_rdblk = opt->rdblk;
		break;
	case Opt_rdblk_def:
		sbinfo->si_rdblk = AUFS_RDBLK_DEF;
		break;
	case Opt_rdhash:
		sbinfo->si_rdhash = opt->rdhash;
		break;
	case Opt_rdhash_def:
		sbinfo->si_rdhash = AUFS_RDHASH_DEF;
		break;

	case Opt_shwh:
		au_opt_set(sbinfo->si_mntflags, SHWH);
		break;
	case Opt_noshwh:
		au_opt_clr(sbinfo->si_mntflags, SHWH);
		break;

	case Opt_trunc_xino:
		au_opt_set(sbinfo->si_mntflags, TRUNC_XINO);
		break;
	case Opt_notrunc_xino:
		au_opt_clr(sbinfo->si_mntflags, TRUNC_XINO);
		break;

	case Opt_trunc_xino_path:
	case Opt_itrunc_xino:
		err = au_xino_trunc(sb, opt->xino_itrunc.bindex);
		if (!err)
			err = 1;
		break;

	case Opt_trunc_xib:
		au_fset_opts(opts->flags, TRUNC_XIB);
		break;
	case Opt_notrunc_xib:
		au_fclr_opts(opts->flags, TRUNC_XIB);
		break;

	default:
		err = 0;
		break;
	}

	return err;
}