On Fri 12-04-24 14:15:17, Jan Kara wrote:
> On Fri 12-04-24 17:49:42, Chao Yu wrote:
> > in order to let caller be aware of failure of mark_dquot_dirty().
> >
> > Signed-off-by: Chao Yu <chao@xxxxxxxxxx>
>
> Thanks. I've added the patch to my tree.
So this patch was buggy because mark_all_dquots() dirty was returning 1 in
case some dquot was indeed dirtied which resulted in e.g.
dquot_alloc_inode() to return 1 and consequently __ext4_new_inode() to fail
and eventually we've crashed in ext4_create(). I've fixed up the patch to
make mark_all_dquots() return 0 or error.
Honza
> > ---
> > fs/quota/dquot.c | 21 ++++++++++++++-------
> > 1 file changed, 14 insertions(+), 7 deletions(-)
> >
> > diff --git a/fs/quota/dquot.c b/fs/quota/dquot.c
> > index dacbee455c03..b2a109d8b198 100644
> > --- a/fs/quota/dquot.c
> > +++ b/fs/quota/dquot.c
> > @@ -1737,7 +1737,7 @@ int __dquot_alloc_space(struct inode *inode, qsize_t number, int flags)
> >
> > if (reserve)
> > goto out_flush_warn;
> > - mark_all_dquot_dirty(dquots);
> > + ret = mark_all_dquot_dirty(dquots);
> > out_flush_warn:
> > srcu_read_unlock(&dquot_srcu, index);
> > flush_warnings(warn);
> > @@ -1786,7 +1786,7 @@ int dquot_alloc_inode(struct inode *inode)
> > warn_put_all:
> > spin_unlock(&inode->i_lock);
> > if (ret == 0)
> > - mark_all_dquot_dirty(dquots);
> > + ret = mark_all_dquot_dirty(dquots);
> > srcu_read_unlock(&dquot_srcu, index);
> > flush_warnings(warn);
> > return ret;
> > @@ -1990,7 +1990,7 @@ int __dquot_transfer(struct inode *inode, struct dquot **transfer_to)
> > qsize_t inode_usage = 1;
> > struct dquot __rcu **dquots;
> > struct dquot *transfer_from[MAXQUOTAS] = {};
> > - int cnt, index, ret = 0;
> > + int cnt, index, ret = 0, err;
> > char is_valid[MAXQUOTAS] = {};
> > struct dquot_warn warn_to[MAXQUOTAS];
> > struct dquot_warn warn_from_inodes[MAXQUOTAS];
> > @@ -2087,8 +2087,12 @@ int __dquot_transfer(struct inode *inode, struct dquot **transfer_to)
> > * mark_all_dquot_dirty().
> > */
> > index = srcu_read_lock(&dquot_srcu);
> > - mark_all_dquot_dirty((struct dquot __rcu **)transfer_from);
> > - mark_all_dquot_dirty((struct dquot __rcu **)transfer_to);
> > + err = mark_all_dquot_dirty((struct dquot __rcu **)transfer_from);
> > + if (err < 0)
> > + ret = err;
> > + err = mark_all_dquot_dirty((struct dquot __rcu **)transfer_to);
> > + if (err < 0)
> > + ret = err;
> > srcu_read_unlock(&dquot_srcu, index);
> >
> > flush_warnings(warn_to);
> > @@ -2098,7 +2102,7 @@ int __dquot_transfer(struct inode *inode, struct dquot **transfer_to)
> > for (cnt = 0; cnt < MAXQUOTAS; cnt++)
> > if (is_valid[cnt])
> > transfer_to[cnt] = transfer_from[cnt];
> > - return 0;
> > + return ret;
> > over_quota:
> > /* Back out changes we already did */
> > for (cnt--; cnt >= 0; cnt--) {
> > @@ -2726,6 +2730,7 @@ static int do_set_dqblk(struct dquot *dquot, struct qc_dqblk *di)
> > struct mem_dqblk *dm = &dquot->dq_dqb;
> > int check_blim = 0, check_ilim = 0;
> > struct mem_dqinfo *dqi = &sb_dqopt(dquot->dq_sb)->info[dquot->dq_id.type];
> > + int ret;
> >
> > if (di->d_fieldmask & ~VFS_QC_MASK)
> > return -EINVAL;
> > @@ -2807,7 +2812,9 @@ static int do_set_dqblk(struct dquot *dquot, struct qc_dqblk *di)
> > else
> > set_bit(DQ_FAKE_B, &dquot->dq_flags);
> > spin_unlock(&dquot->dq_dqb_lock);
> > - mark_dquot_dirty(dquot);
> > + ret = mark_dquot_dirty(dquot);
> > + if (ret < 0)
> > + return ret;
> >
> > return 0;
> > }
> > --
> > 2.40.1
> >
> --
> Jan Kara <jack@xxxxxxxx>
> SUSE Labs, CR
>
--
Jan Kara <jack@xxxxxxxx>
SUSE Labs, CR
