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;
}
