/* round robin */ static int au_wbr_create_init_rr(struct super_block *sb) { int err; err = au_wbr_bu(sb, au_sbend(sb)); atomic_set(&au_sbi(sb)->si_wbr_rr_next, -err); /* less important */ /* smp_mb(); */ AuDbg("b%d\n", err); return err; }
/* top down parent */ static int au_wbr_create_tdp(struct dentry *dentry, unsigned int flags __maybe_unused) { int err; aufs_bindex_t bstart, bindex; struct super_block *sb; struct dentry *parent, *h_parent; sb = dentry->d_sb; bstart = au_dbstart(dentry); err = bstart; if (!au_br_rdonly(au_sbr(sb, bstart))) goto out; err = -EROFS; parent = dget_parent(dentry); for (bindex = au_dbstart(parent); bindex < bstart; bindex++) { h_parent = au_h_dptr(parent, bindex); if (!h_parent || !h_parent->d_inode) continue; if (!au_br_rdonly(au_sbr(sb, bindex))) { err = bindex; break; } } dput(parent); /* bottom up here */ if (unlikely(err < 0)) { err = au_wbr_bu(sb, bstart - 1); if (err >= 0) err = au_wbr_nonopq(dentry, err); } out: AuDbg("b%d\n", err); return err; }