static int au_wbr_create_mfs(struct dentry *dentry, int isdir __maybe_unused) { int err; struct super_block *sb; struct au_wbr_mfs *mfs; err = au_wbr_create_exp(dentry); if (err >= 0) goto out; sb = dentry->d_sb; mfs = &au_sbi(sb)->si_wbr_mfs; mutex_lock(&mfs->mfs_lock); if (time_after(jiffies, mfs->mfs_jiffy + mfs->mfs_expire) || mfs->mfs_bindex < 0 || au_br_rdonly(au_sbr(sb, mfs->mfs_bindex))) au_mfs(dentry); mutex_unlock(&mfs->mfs_lock); err = mfs->mfs_bindex; if (err >= 0) err = au_wbr_nonopq(dentry, err); out: AuDbg("b%d\n", err); return err; }
static int au_wbr_create_mfs(struct dentry *dentry, unsigned int flags) { int err; struct dentry *parent; struct super_block *sb; struct au_wbr_mfs *mfs; err = au_wbr_create_exp(dentry); if (err >= 0) goto out; sb = dentry->d_sb; parent = NULL; if (au_ftest_wbr(flags, PARENT)) parent = dget_parent(dentry); mfs = &au_sbi(sb)->si_wbr_mfs; mutex_lock(&mfs->mfs_lock); if (time_after(jiffies, mfs->mfs_jiffy + mfs->mfs_expire) || mfs->mfs_bindex < 0 || au_br_rdonly(au_sbr(sb, mfs->mfs_bindex))) au_mfs(dentry, parent); mutex_unlock(&mfs->mfs_lock); err = mfs->mfs_bindex; dput(parent); if (err >= 0) err = au_wbr_nonopq(dentry, err); out: AuDbg("b%d\n", err); return err; }
static int au_wbr_create_rr(struct dentry *dentry, int isdir) { int err, nbr; unsigned int u; aufs_bindex_t bindex, bend; struct super_block *sb; atomic_t *next; err = au_wbr_create_exp(dentry); if (err >= 0) goto out; sb = dentry->d_sb; next = &au_sbi(sb)->si_wbr_rr_next; bend = au_sbend(sb); nbr = bend + 1; for (bindex = 0; bindex <= bend; bindex++) { if (!isdir) { err = atomic_dec_return(next) + 1; /* modulo for 0 is meaningless */ if (unlikely(!err)) err = atomic_dec_return(next) + 1; } else err = atomic_read(next); AuDbg("%d\n", err); u = err; err = u % nbr; AuDbg("%d\n", err); if (!au_br_rdonly(au_sbr(sb, err))) break; err = -EROFS; } if (err >= 0) err = au_wbr_nonopq(dentry, err); out: AuDbg("%d\n", err); return err; }