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propagate_one(): separate the "do we need secondary here?" logics

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take the checks into separate helper - need_secondary(mount, mountpoint).

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
This commit is contained in:
Al Viro 2025-06-27 23:04:23 -04:00
parent 2b2a34793d
commit 15e710b8bb
1 changed files with 17 additions and 11 deletions
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28
fs/pnode.c
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@ -218,19 +218,24 @@ static struct mount *next_group(struct mount *m, struct mount *origin)
static struct mount *last_dest, *first_source, *last_source;
static struct hlist_head *list;
static bool need_secondary(struct mount *m, struct mountpoint *dest_mp)
{
/* skip ones added by this propagate_mnt() */
if (IS_MNT_NEW(m))
return false;
/* skip if mountpoint isn't visible in m */
if (!is_subdir(dest_mp->m_dentry, m->mnt.mnt_root))
return false;
/* skip if m is in the anon_ns */
if (is_anon_ns(m->mnt_ns))
return false;
return true;
}
static int propagate_one(struct mount *m, struct mountpoint *dest_mp)
{
struct mount *child;
int type;
/* skip ones added by this propagate_mnt() */
if (IS_MNT_NEW(m))
return 0;
/* skip if mountpoint isn't visible in m */
if (!is_subdir(dest_mp->m_dentry, m->mnt.mnt_root))
return 0;
/* skip if m is in the anon_ns */
if (is_anon_ns(m->mnt_ns))
return 0;
if (peers(m, last_dest)) {
type = CL_MAKE_SHARED;
@ -313,11 +318,12 @@ int propagate_mnt(struct mount *dest_mnt, struct mountpoint *dest_mp,
n = m;
}
do {
if (!need_secondary(n, dest_mp))
continue;
err = propagate_one(n, dest_mp);
if (err)
break;
n = next_peer(n);
} while (n != m);
} while ((n = next_peer(n)) != m);
}
hlist_for_each_entry(n, tree_list, mnt_hash) {