On Fri, Nov 13, 2015 at 03:29:39PM -0600, Eric Sandeen wrote:
> On 11/13/15 3:08 AM, Christoph Hellwig wrote:
> > On Fri, Nov 13, 2015 at 07:12:31AM +1100, Dave Chinner wrote:
> >> On Thu, Nov 12, 2015 at 08:58:01AM -0800, Christoph Hellwig wrote:
> >>> I think the problem here is simply that our interfaces suck.
> >>> xfs_trans_roll really needs to rejoin any inode to the new transaction
> >>> to that was joined to the previous one. Once we've fixed that we can
> >>> get rid of the silly committed arguments and everyone will be happy.
> >>
> >> xfs_trans_roll is not specifically for rolling transactions with
> >> locked inodes in them. We could use it for any object that needs
> >> multiple transactions to modify. e.g. we could roll transactions
> >> across an AGF (using hold+join) so that it remains locked across
> >> multiple allocation/free transactions.
> >
> > xfs_trans_roll already logs the inode core, which requires the
> > inode to be attached to the transaction. While I could see the
> > point of moving this out of the core __xfs_trans_roll into an
> > xfs_trans_roll_inode helper we might as well follow the current
> > interface for now.
>
> Trying to follow you guys ;)
>
> Something like this?
yes, something like that ;)
(better late than never!)
-Dave.
> diff --git a/fs/xfs/xfs_bmap_util.c b/fs/xfs/xfs_bmap_util.c
> index dbae649..d23bce8 100644
> --- a/fs/xfs/xfs_bmap_util.c
> +++ b/fs/xfs/xfs_bmap_util.c
> @@ -91,32 +91,32 @@ xfs_zero_extent(
> * last due to locking considerations. We never free any extents in
> * the first transaction.
> *
> - * Return 1 if the given transaction was committed and a new one
> - * started, and 0 otherwise in the committed parameter.
> + * If an inode *ip is provided, rejoin it to the transaction if
> + * the transaction was committed.
> */
> int /* error */
> xfs_bmap_finish(
> struct xfs_trans **tp, /* transaction pointer addr */
> struct xfs_bmap_free *flist, /* i/o: list extents to free */
> - int *committed)/* xact committed or not */
> + xfs_inode_t *ip)
> {
> struct xfs_efd_log_item *efd; /* extent free data */
> struct xfs_efi_log_item *efi; /* extent free intention */
> int error; /* error return value */
> + int committed;/* xact committed or not */
> struct xfs_bmap_free_item *free; /* free extent item */
> struct xfs_bmap_free_item *next; /* next item on free list */
>
> ASSERT((*tp)->t_flags & XFS_TRANS_PERM_LOG_RES);
> - if (flist->xbf_count == 0) {
> - *committed = 0;
> + if (flist->xbf_count == 0)
> return 0;
> - }
> +
> efi = xfs_trans_get_efi(*tp, flist->xbf_count);
> for (free = flist->xbf_first; free; free = free->xbfi_next)
> xfs_trans_log_efi_extent(*tp, efi, free->xbfi_startblock,
> free->xbfi_blockcount);
>
> - error = __xfs_trans_roll(tp, NULL, committed);
> + error = __xfs_trans_roll(tp, ip, &committed);
> if (error) {
> /*
> * If the transaction was committed, drop the EFD reference
> @@ -128,16 +128,13 @@ xfs_bmap_finish(
> * transaction so we should return committed=1 even though we're
> * returning an error.
> */
> - if (*committed) {
> + if (committed) {
> xfs_efi_release(efi);
> xfs_force_shutdown((*tp)->t_mountp,
> (error == -EFSCORRUPTED) ?
> SHUTDOWN_CORRUPT_INCORE :
> SHUTDOWN_META_IO_ERROR);
> - } else {
> - *committed = 1;
> }
> -
> return error;
> }
>
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>
--
Dave Chinner
david@xxxxxxxxxxxxx
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