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| author | Yan, Zheng <zyan@redhat.com> | 2017-10-10 17:06:25 +0800 |
|---|---|---|
| committer | Ilya Dryomov <idryomov@gmail.com> | 2017-11-13 12:11:29 +0100 |
| commit | 933ad2c9c8bbb1623c2d3c5753ad340152e15d9d (patch) | |
| tree | 2cb624291e7d4d97dea691b39e0d094fab3c94ee /fs/ceph | |
| parent | 7271efa79f8bc01694d1a9fce597088a97b3b160 (diff) | |
| download | linux-933ad2c9c8bbb1623c2d3c5753ad340152e15d9d.tar.gz | |
ceph: disable cached readdir after dropping positive dentry
Ideally CEPH_CAP_FILE_SHARED should have been revoked before postive dentry get dropped. But if something goes wrong, later cached readdir may dereference the dropped dentry. Signed-off-by: "Yan, Zheng" <zyan@redhat.com> Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
Diffstat (limited to 'fs/ceph')
| -rw-r--r-- | fs/ceph/inode.c | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/fs/ceph/inode.c b/fs/ceph/inode.c index 6301bf299b7c..16d8b9dac649 100644 --- a/fs/ceph/inode.c +++ b/fs/ceph/inode.c @@ -1186,6 +1186,7 @@ retry_lookup: ceph_snap(d_inode(dn)) != tvino.snap)) { dout(" dn %p points to wrong inode %p\n", dn, d_inode(dn)); + ceph_dir_clear_ordered(dir); d_delete(dn); dput(dn); goto retry_lookup; @@ -1323,6 +1324,7 @@ retry_lookup: dout(" %p links to %p %llx.%llx, not %llx.%llx\n", dn, d_inode(dn), ceph_vinop(d_inode(dn)), ceph_vinop(in)); + ceph_dir_clear_ordered(dir); d_invalidate(dn); have_lease = false; } @@ -1574,6 +1576,7 @@ retry_lookup: ceph_snap(d_inode(dn)) != tvino.snap)) { dout(" dn %p points to wrong inode %p\n", dn, d_inode(dn)); + __ceph_dir_clear_ordered(ci); d_delete(dn); dput(dn); goto retry_lookup; @@ -1598,7 +1601,9 @@ retry_lookup: &req->r_caps_reservation); if (ret < 0) { pr_err("fill_inode badness on %p\n", in); - if (d_really_is_negative(dn)) + if (d_really_is_positive(dn)) + __ceph_dir_clear_ordered(ci); + else iput(in); d_drop(dn); err = ret; |