mirror of https://github.com/OpenIPC/firmware.git
42 lines
1.0 KiB
Diff
42 lines
1.0 KiB
Diff
diff -drupN a/fs/pnode.c b/fs/pnode.c
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--- a/fs/pnode.c 2018-08-06 17:23:04.000000000 +0300
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+++ b/fs/pnode.c 2022-06-12 05:28:14.000000000 +0300
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@@ -609,3 +609,37 @@ int propagate_umount(struct list_head *l
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return 0;
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}
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+
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+/*
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+ * Iterates over all slaves, and slaves of slaves.
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+ */
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+static struct mount *next_descendent(struct mount *root, struct mount *cur)
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+{
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+ if (!IS_MNT_NEW(cur) && !list_empty(&cur->mnt_slave_list))
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+ return first_slave(cur);
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+ do {
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+ struct mount *master = cur->mnt_master;
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+
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+ if (!master || cur->mnt_slave.next != &master->mnt_slave_list) {
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+ struct mount *next = next_slave(cur);
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+
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+ return (next == root) ? NULL : next;
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+ }
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+ cur = master;
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+ } while (cur != root);
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+ return NULL;
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+}
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+
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+void propagate_remount(struct mount *mnt)
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+{
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+ struct mount *m = mnt;
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+ struct super_block *sb = mnt->mnt.mnt_sb;
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+
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+ if (sb->s_op->copy_mnt_data) {
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+ m = next_descendent(mnt, m);
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+ while (m) {
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+ sb->s_op->copy_mnt_data(m->mnt.data, mnt->mnt.data);
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+ m = next_descendent(mnt, m);
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+ }
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+ }
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+}
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