On Fri, 2022-09-23 at 15:08 -0700, Darrick J. Wong wrote:
> On Wed, Sep 21, 2022 at 10:44:52PM -0700,
> allison.henderson@xxxxxxxxxx wrote:
> > From: Allison Henderson <allison.henderson@xxxxxxxxxx>
> >
> > This patch removes the old parent pointer attribute during the
> > rename
> > operation, and re-adds the updated parent pointer. In the case of
> > xfs_cross_rename, we modify the routine not to roll the transaction
> > just
> > yet. We will do this after the parent pointer is added in the
> > calling
> > xfs_rename function.
> >
> > Signed-off-by: Allison Henderson <allison.henderson@xxxxxxxxxx>
> > ---
> > fs/xfs/libxfs/xfs_attr.c | 2 +-
> > fs/xfs/libxfs/xfs_attr.h | 1 +
> > fs/xfs/libxfs/xfs_parent.c | 31 +++++++++++++++++
> > fs/xfs/libxfs/xfs_parent.h | 7 ++++
> > fs/xfs/xfs_inode.c | 69
> > +++++++++++++++++++++++++++++++++++---
> > 5 files changed, 104 insertions(+), 6 deletions(-)
> >
> > diff --git a/fs/xfs/libxfs/xfs_attr.c b/fs/xfs/libxfs/xfs_attr.c
> > index e967728d1ee7..3f9bd8401f33 100644
> > --- a/fs/xfs/libxfs/xfs_attr.c
> > +++ b/fs/xfs/libxfs/xfs_attr.c
> > @@ -923,7 +923,7 @@ xfs_attr_defer_add(
> > }
> >
> > /* Sets an attribute for an inode as a deferred operation */
> > -static int
> > +int
> > xfs_attr_defer_replace(
> > struct xfs_da_args *args)
> > {
> > diff --git a/fs/xfs/libxfs/xfs_attr.h b/fs/xfs/libxfs/xfs_attr.h
> > index 033005542b9e..985761264d1f 100644
> > --- a/fs/xfs/libxfs/xfs_attr.h
> > +++ b/fs/xfs/libxfs/xfs_attr.h
> > @@ -546,6 +546,7 @@ int xfs_attr_get_ilocked(struct xfs_da_args
> > *args);
> > int xfs_attr_get(struct xfs_da_args *args);
> > int xfs_attr_defer_add(struct xfs_da_args *args);
> > int xfs_attr_defer_remove(struct xfs_da_args *args);
> > +int xfs_attr_defer_replace(struct xfs_da_args *args);
> > int xfs_attr_set(struct xfs_da_args *args);
> > int xfs_attr_set_iter(struct xfs_attr_intent *attr);
> > int xfs_attr_remove_iter(struct xfs_attr_intent *attr);
> > diff --git a/fs/xfs/libxfs/xfs_parent.c
> > b/fs/xfs/libxfs/xfs_parent.c
> > index 378fa227b87f..7db1570e1841 100644
> > --- a/fs/xfs/libxfs/xfs_parent.c
> > +++ b/fs/xfs/libxfs/xfs_parent.c
> > @@ -141,6 +141,37 @@ xfs_parent_defer_remove(
> > return xfs_attr_defer_remove(args);
> > }
> >
> > +
> > +int
> > +xfs_parent_defer_replace(
> > + struct xfs_trans *tp,
> > + struct xfs_inode *old_ip,
> > + struct xfs_parent_defer *old_parent,
> > + xfs_dir2_dataptr_t old_diroffset,
> > + struct xfs_name *parent_name,
> > + struct xfs_inode *new_ip,
> > + struct xfs_parent_defer *new_parent,
> > + xfs_dir2_dataptr_t new_diroffset,
> > + struct xfs_inode *child)
> > +{
> > + struct xfs_da_args *args = &new_parent->args;
> > +
> > + xfs_init_parent_name_rec(&old_parent->rec, old_ip,
> > old_diroffset);
> > + xfs_init_parent_name_rec(&new_parent->rec, new_ip,
> > new_diroffset);
> > + new_parent->args.name = (const uint8_t *)&old_parent->rec;
> > + new_parent->args.namelen = sizeof(struct
> > xfs_parent_name_rec);
> > + new_parent->args.new_name = (const uint8_t *)&new_parent-
> > >rec;
> > + new_parent->args.new_namelen = sizeof(struct
> > xfs_parent_name_rec);
> > + args->trans = tp;
> > + args->dp = child;
> > + if (parent_name) {
> > + new_parent->args.value = (void *)parent_name->name;
> > + new_parent->args.valuelen = parent_name->len;
> > + }
> > + args->hashval = xfs_da_hashname(args->name, args->namelen);
> > + return xfs_attr_defer_replace(args);
> > +}
> > +
> > void
> > xfs_parent_cancel(
> > xfs_mount_t *mp,
> > diff --git a/fs/xfs/libxfs/xfs_parent.h
> > b/fs/xfs/libxfs/xfs_parent.h
> > index 79d3fabb5e56..b2ed4f373799 100644
> > --- a/fs/xfs/libxfs/xfs_parent.h
> > +++ b/fs/xfs/libxfs/xfs_parent.h
> > @@ -27,6 +27,13 @@ int xfs_parent_init(xfs_mount_t *mp, struct
> > xfs_parent_defer **parentp);
> > int xfs_parent_defer_add(struct xfs_trans *tp, struct
> > xfs_parent_defer *parent,
> > struct xfs_inode *dp, struct xfs_name
> > *parent_name,
> > xfs_dir2_dataptr_t diroffset, struct
> > xfs_inode *child);
> > +int xfs_parent_defer_replace(struct xfs_trans *tp, struct
> > xfs_inode *old_ip,
> > + struct xfs_parent_defer *old_parent,
> > + xfs_dir2_dataptr_t old_diroffset,
> > + struct xfs_name *parent_name, struct
> > xfs_inode *new_ip,
> > + struct xfs_parent_defer *new_parent,
> > + xfs_dir2_dataptr_t new_diroffset,
> > + struct xfs_inode *child);
> > int xfs_parent_defer_remove(struct xfs_trans *tp, struct xfs_inode
> > *dp,
> > struct xfs_parent_defer *parent,
> > xfs_dir2_dataptr_t diroffset,
> > diff --git a/fs/xfs/xfs_inode.c b/fs/xfs/xfs_inode.c
> > index 4a8399d35b17..3a2bec4ba228 100644
> > --- a/fs/xfs/xfs_inode.c
> > +++ b/fs/xfs/xfs_inode.c
> > @@ -2912,6 +2912,12 @@ xfs_rename(
> > int spaceres;
> > bool retried = false;
> > int error, nospace_error = 0;
> > + xfs_dir2_dataptr_t new_diroffset;
> > + xfs_dir2_dataptr_t old_diroffset;
> > + struct xfs_parent_defer *old_parent_ptr = NULL;
> > + struct xfs_parent_defer *new_parent_ptr = NULL;
> > + struct xfs_parent_defer *target_parent_ptr = NULL;
> > + struct xfs_parent_defer *wip_parent_ptr = NULL;
> >
> > trace_xfs_rename(src_dp, target_dp, src_name, target_name);
> >
> > @@ -2925,7 +2931,8 @@ xfs_rename(
> > */
> > if (flags & RENAME_WHITEOUT) {
> > error = xfs_rename_alloc_whiteout(mnt_userns,
> > src_name,
> > - target_dp, false,
> > &wip);
> > + target_dp,
> > xfs_has_parent(mp),
> > + &wip);
> > if (error)
> > return error;
> >
> > @@ -2935,6 +2942,24 @@ xfs_rename(
> >
> > xfs_sort_for_rename(src_dp, target_dp, src_ip, target_ip,
> > wip,
> > inodes, &num_inodes);
> > + if (xfs_has_parent(mp)) {
> > + error = xfs_parent_init(mp, &old_parent_ptr);
> > + if (error)
> > + goto out_release_wip;
> > + error = xfs_parent_init(mp, &new_parent_ptr);
> > + if (error)
> > + goto out_release_wip;
> > + if (wip) {
> > + error = xfs_parent_init(mp,
> > &wip_parent_ptr);
> > + if (error)
> > + goto out_release_wip;
> > + }
> > + if (target_ip != NULL) {
> > + error = xfs_parent_init(mp,
> > &target_parent_ptr);
> > + if (error)
> > + goto out_release_wip;
> > + }
> > + }
> >
> > retry:
> > nospace_error = 0;
>
> Same block reservation comment as most of the previous ones, except
> this
> one is super nasty:
>
> unsigned int
> xfs_rename_space_res(
> struct xfs_mount *mp,
> struct xfs_name *src_name,
> struct xfs_parent_defer *target_parent_ptr,
> struct xfs_name *target_name,
> struct xfs_parent_defer *new_parent_ptr,
> struct xfs_inode *wip)
> {
> unsigned int ret;
>
> /* XXX is the target_name->len usage below correct? */
> ret = XFS_DIRREMOVE_SPACE_RES(mp) +
> XFS_DIRENTER_SPACE_RES(mp, target_name->len);
>
> if (new_parent_ptr) {
> if (wip)
> ret += xfs_pptr_calc_space_res(mp, src_name-
> >len);
> ret += 2 * xfs_pptr_calc_space_res(mp, target_name-
> >len);
> }
> if (target_parent_ptr)
> ret += xfs_pptr_calc_space_res(mp, target_name->len);
>
> return ret;
> }
>
> xfs_rename(...)
> {
> spacres = xfs_rename_space_res(mp, src_name,
> target_parent_ptr,
> target_name, new_parent_ptr, wip);
> error = xfs_trans_alloc(mp, &M_RES(mp)->tr_rename, spaceres,
> 0,
> 0, &tp);
> /* ... */
> }
>
Ok, will add these helpers to the xfs_*_space_res collection.
Thanks!
Allison
> (The rest of the logic looks ok now.)
>
> --D
>
> > @@ -3110,7 +3135,7 @@ xfs_rename(
> > * to account for the ".." reference from the new
> > entry.
> > */
> > error = xfs_dir_createname(tp, target_dp,
> > target_name,
> > - src_ip->i_ino, spaceres,
> > NULL);
> > + src_ip->i_ino, spaceres,
> > &new_diroffset);
> > if (error)
> > goto out_trans_cancel;
> >
> > @@ -3131,7 +3156,7 @@ xfs_rename(
> > * name at the destination directory, remove it
> > first.
> > */
> > error = xfs_dir_replace(tp, target_dp, target_name,
> > - src_ip->i_ino, spaceres,
> > NULL);
> > + src_ip->i_ino, spaceres,
> > &new_diroffset);
> > if (error)
> > goto out_trans_cancel;
> >
> > @@ -3204,14 +3229,39 @@ xfs_rename(
> > */
> > if (wip)
> > error = xfs_dir_replace(tp, src_dp, src_name, wip-
> > >i_ino,
> > - spaceres, NULL);
> > + spaceres, &old_diroffset);
> > else
> > error = xfs_dir_removename(tp, src_dp, src_name,
> > src_ip->i_ino,
> > - spaceres, NULL);
> > + spaceres,
> > &old_diroffset);
> >
> > if (error)
> > goto out_trans_cancel;
> >
> > + if (new_parent_ptr) {
> > + if (wip) {
> > + error = xfs_parent_defer_add(tp,
> > wip_parent_ptr,
> > + src_dp,
> > src_name,
> > + old_diroffset,
> > wip);
> > + if (error)
> > + goto out_trans_cancel;
> > + }
> > +
> > + error = xfs_parent_defer_replace(tp, src_dp,
> > old_parent_ptr,
> > + old_diroffset,
> > target_name,
> > + target_dp,
> > new_parent_ptr,
> > + new_diroffset,
> > src_ip);
> > + if (error)
> > + goto out_trans_cancel;
> > + }
> > +
> > + if (target_parent_ptr) {
> > + error = xfs_parent_defer_remove(tp, target_dp,
> > + target_parent_ptr,
> > + new_diroffset,
> > target_ip);
> > + if (error)
> > + goto out_trans_cancel;
> > + }
> > +
> > xfs_trans_ichgtime(tp, src_dp, XFS_ICHGTIME_MOD |
> > XFS_ICHGTIME_CHG);
> > xfs_trans_log_inode(tp, src_dp, XFS_ILOG_CORE);
> > if (new_parent)
> > @@ -3234,6 +3284,15 @@ xfs_rename(
> > i--;
> > }
> > out_release_wip:
> > + if (new_parent_ptr)
> > + xfs_parent_cancel(mp, new_parent_ptr);
> > + if (old_parent_ptr)
> > + xfs_parent_cancel(mp, old_parent_ptr);
> > + if (target_parent_ptr)
> > + xfs_parent_cancel(mp, target_parent_ptr);
> > + if (wip_parent_ptr)
> > + xfs_parent_cancel(mp, wip_parent_ptr);
> > +
> > if (wip)
> > xfs_irele(wip);
> > if (error == -ENOSPC && nospace_error)
> > --
> > 2.25.1
> >
