/* Since mvdown succeeded, we ignore an error of this function */
static void au_do_stfs(const unsigned char dmsg, struct au_mvd_args *a)
{
int err;
struct au_branch *br;
a->mvdown.flags |= AUFS_MVDOWN_STFS_FAILED;
br = au_sbr(a->sb, a->mvd_bsrc);
err = au_br_stfs(br, &a->mvdown.stbr[AUFS_MVDOWN_UPPER].stfs);
if (!err) {
br = au_sbr(a->sb, a->mvd_bdst);
a->mvdown.stbr[AUFS_MVDOWN_LOWER].brid = br->br_id;
err = au_br_stfs(br, &a->mvdown.stbr[AUFS_MVDOWN_LOWER].stfs);
}
if (!err)
a->mvdown.flags &= ~AUFS_MVDOWN_STFS_FAILED;
else
AU_MVD_PR(dmsg, "statfs failed (%d), ignored\n", err);
}
static int au_fhsm_stfs(struct super_block *sb, aufs_bindex_t bindex,
struct aufs_stfs *rstfs, int do_lock, int do_notify)
{
int err;
struct au_branch *br;
struct au_br_fhsm *bf;
br = au_sbr(sb, bindex);
AuDebugOn(au_br_rdonly(br));
bf = br->br_fhsm;
AuDebugOn(!bf);
if (do_lock)
mutex_lock(&bf->bf_lock);
else
MtxMustLock(&bf->bf_lock);
/* sb->s_root for NFS is unreliable */
err = au_br_stfs(br, &bf->bf_stfs);
if (unlikely(err)) {
AuErr1("FHSM failed (%d), b%d, ignored.\n", bindex, err);
goto out;
}
bf->bf_jiffy = jiffies;
bf->bf_readable = 1;
if (do_notify)
au_fhsm_notify(sb, /*val*/1);
if (rstfs)
*rstfs = bf->bf_stfs;
out:
if (do_lock)
mutex_unlock(&bf->bf_lock);
au_fhsm_notify(sb, /*val*/1);
return err;
}
