Hi all,
On Fri, 6 Mar 2020 10:21:58 +1100 Stephen Rothwell <sfr@xxxxxxxxxxxxxxxx> wrote:
>
> Today's linux-next merge of the net-next tree got a conflict in:
>
> fs/sysfs/group.c
>
> between commit:
>
> 9255782f7061 ("sysfs: Wrap __compat_only_sysfs_link_entry_to_kobj function to change the symlink name")
>
> from the powerpc tree and commit:
>
> 303a42769c4c ("sysfs: add sysfs_group{s}_change_owner()")
>
> from the net-next tree.
>
> I fixed it up (see below) and can carry the fix as necessary. This
> is now fixed as far as linux-next is concerned, but any non trivial
> conflicts should be mentioned to your upstream maintainer when your tree
> is submitted for merging. You may also want to consider cooperating
> with the maintainer of the conflicting tree to minimise any particularly
> complex conflicts.
>
> --
> Cheers,
> Stephen Rothwell
>
> diff --cc fs/sysfs/group.c
> index 1e2a096057bc,5afe0e7ff7cd..000000000000
> --- a/fs/sysfs/group.c
> +++ b/fs/sysfs/group.c
> @@@ -478,4 -457,118 +479,118 @@@ int compat_only_sysfs_link_entry_to_kob
> kernfs_put(target);
> return PTR_ERR_OR_ZERO(link);
> }
> -EXPORT_SYMBOL_GPL(__compat_only_sysfs_link_entry_to_kobj);
> +EXPORT_SYMBOL_GPL(compat_only_sysfs_link_entry_to_kobj);
> +
> + static int sysfs_group_attrs_change_owner(struct kernfs_node *grp_kn,
> + const struct attribute_group *grp,
> + struct iattr *newattrs)
> + {
> + struct kernfs_node *kn;
> + int error;
> +
> + if (grp->attrs) {
> + struct attribute *const *attr;
> +
> + for (attr = grp->attrs; *attr; attr++) {
> + kn = kernfs_find_and_get(grp_kn, (*attr)->name);
> + if (!kn)
> + return -ENOENT;
> +
> + error = kernfs_setattr(kn, newattrs);
> + kernfs_put(kn);
> + if (error)
> + return error;
> + }
> + }
> +
> + if (grp->bin_attrs) {
> + struct bin_attribute *const *bin_attr;
> +
> + for (bin_attr = grp->bin_attrs; *bin_attr; bin_attr++) {
> + kn = kernfs_find_and_get(grp_kn, (*bin_attr)->attr.name);
> + if (!kn)
> + return -ENOENT;
> +
> + error = kernfs_setattr(kn, newattrs);
> + kernfs_put(kn);
> + if (error)
> + return error;
> + }
> + }
> +
> + return 0;
> + }
> +
> + /**
> + * sysfs_group_change_owner - change owner of an attribute group.
> + * @kobj: The kobject containing the group.
> + * @grp: The attribute group.
> + * @kuid: new owner's kuid
> + * @kgid: new owner's kgid
> + *
> + * Returns 0 on success or error code on failure.
> + */
> + int sysfs_group_change_owner(struct kobject *kobj,
> + const struct attribute_group *grp, kuid_t kuid,
> + kgid_t kgid)
> + {
> + struct kernfs_node *grp_kn;
> + int error;
> + struct iattr newattrs = {
> + .ia_valid = ATTR_UID | ATTR_GID,
> + .ia_uid = kuid,
> + .ia_gid = kgid,
> + };
> +
> + if (!kobj->state_in_sysfs)
> + return -EINVAL;
> +
> + if (grp->name) {
> + grp_kn = kernfs_find_and_get(kobj->sd, grp->name);
> + } else {
> + kernfs_get(kobj->sd);
> + grp_kn = kobj->sd;
> + }
> + if (!grp_kn)
> + return -ENOENT;
> +
> + error = kernfs_setattr(grp_kn, &newattrs);
> + if (!error)
> + error = sysfs_group_attrs_change_owner(grp_kn, grp, &newattrs);
> +
> + kernfs_put(grp_kn);
> +
> + return error;
> + }
> + EXPORT_SYMBOL_GPL(sysfs_group_change_owner);
> +
> + /**
> + * sysfs_groups_change_owner - change owner of a set of attribute groups.
> + * @kobj: The kobject containing the groups.
> + * @groups: The attribute groups.
> + * @kuid: new owner's kuid
> + * @kgid: new owner's kgid
> + *
> + * Returns 0 on success or error code on failure.
> + */
> + int sysfs_groups_change_owner(struct kobject *kobj,
> + const struct attribute_group **groups,
> + kuid_t kuid, kgid_t kgid)
> + {
> + int error = 0, i;
> +
> + if (!kobj->state_in_sysfs)
> + return -EINVAL;
> +
> + if (!groups)
> + return 0;
> +
> + for (i = 0; groups[i]; i++) {
> + error = sysfs_group_change_owner(kobj, groups[i], kuid, kgid);
> + if (error)
> + break;
> + }
> +
> + return error;
> + }
> + EXPORT_SYMBOL_GPL(sysfs_groups_change_owner);
This is now a conflict between the powerpc tree and Linus' tree.
--
Cheers,
Stephen Rothwell
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