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author | Dmitry Shmidt <dimitrysh@google.com> | 2017-02-15 18:02:55 -0800 |
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committer | Dmitry Shmidt <dimitrysh@google.com> | 2017-02-15 18:02:55 -0800 |
commit | 232c28fe23b88e7027c6a20965d6e78421a40532 (patch) | |
tree | 5aa60cbba4879c913ddd8ee7a7d835c56e53ed8e /fs/pnode.c | |
parent | 54640cfe47251cd8acd7145ff86bcaf4db0e9616 (diff) | |
parent | 56026a89e632af0cf45602dee1b2881bf21c4eba (diff) |
Merge remote-tracking branch 'common/android-4.4' into android-4.4.y
Change-Id: Icf907f5067fb6da5935ab0d3271df54b8d5df405
Diffstat (limited to 'fs/pnode.c')
-rw-r--r-- | fs/pnode.c | 29 |
1 files changed, 29 insertions, 0 deletions
diff --git a/fs/pnode.c b/fs/pnode.c index 99899705b105..cbaa998ad625 100644 --- a/fs/pnode.c +++ b/fs/pnode.c @@ -458,3 +458,32 @@ int propagate_umount(struct list_head *list) __propagate_umount(mnt); return 0; } + +/* + * Iterates over all slaves, and slaves of slaves. + */ +static struct mount *next_descendent(struct mount *root, struct mount *cur) +{ + if (!IS_MNT_NEW(cur) && !list_empty(&cur->mnt_slave_list)) + return first_slave(cur); + do { + if (cur->mnt_slave.next != &cur->mnt_master->mnt_slave_list) + return next_slave(cur); + cur = cur->mnt_master; + } while (cur != root); + return NULL; +} + +void propagate_remount(struct mount *mnt) +{ + struct mount *m = mnt; + struct super_block *sb = mnt->mnt.mnt_sb; + + if (sb->s_op->copy_mnt_data) { + m = next_descendent(mnt, m); + while (m) { + sb->s_op->copy_mnt_data(m->mnt.data, mnt->mnt.data); + m = next_descendent(mnt, m); + } + } +} |