On Thu 17-12-09 03:35:25, Dmitry Monakhov wrote:
> Hi, Jan.
> I've prepared additional patch for quota reserved space management.
> Initially I've overlooked case when quota is not active, but in fact
> it seems reasonable to generalize reservation to that case as we do
> for i_block/i_bytes reservation.
> Possibly it should be folded in to c35fc5af93955aa22efc6568e5ae5b2cadbc086f
>
> CHANGE_LOG:
> quota: manage reserved space even when quota is not active
> Since we implemented generic reserved space management interface,
> then it is possible to account reserved space even quota when quota
> is not active (similar to i_blocks/i_bytes).
Yes, that's reasonable. I'll fold the patch into your
"quota: decouple fs reserved space from quota reservation" but please fix
things I write below.
> diff --git a/fs/quota/dquot.c b/fs/quota/dquot.c
> index dea86ab..de7e7de 100644
> --- a/fs/quota/dquot.c
> +++ b/fs/quota/dquot.c
> @@ -1351,15 +1351,14 @@ static qsize_t *inode_reserved_space(struct inode * inode)
> return inode->i_sb->dq_op->get_reserved_space(inode);
> }
>
> -static void inode_add_rsv_space(struct inode *inode, qsize_t number)
> +void inode_add_rsv_space(struct inode *inode, qsize_t number)
> {
> spin_lock(&inode->i_lock);
> *inode_reserved_space(inode) += number;
> spin_unlock(&inode->i_lock);
> }
>
> -
> -static void inode_claim_rsv_space(struct inode *inode, qsize_t number)
> +void inode_claim_rsv_space(struct inode *inode, qsize_t number)
> {
> spin_lock(&inode->i_lock);
> *inode_reserved_space(inode) -= number;
> @@ -1367,14 +1366,14 @@ static void inode_claim_rsv_space(struct inode *inode, qsize_t number)
> spin_unlock(&inode->i_lock);
> }
>
> -static void inode_sub_rsv_space(struct inode *inode, qsize_t number)
> +void inode_sub_rsv_space(struct inode *inode, qsize_t number)
> {
> spin_lock(&inode->i_lock);
> *inode_reserved_space(inode) -= number;
> spin_unlock(&inode->i_lock);
> }
The above three functions need to be exported (needed when ext4 is a
module).
> -static qsize_t inode_get_rsv_space(struct inode *inode)
> +qsize_t inode_get_rsv_space(struct inode *inode)
I think this does not need to be visible outside.
Honza
--
Jan Kara <jack@xxxxxxx>
SUSE Labs, CR
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