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| author | Yan, Zheng <zyan@redhat.com> | 2019-05-23 11:01:37 +0800 |
|---|---|---|
| committer | Ilya Dryomov <idryomov@gmail.com> | 2019-07-08 14:01:42 +0200 |
| commit | d6e47819721ae2d9d090058ad5570a66f3c42e39 (patch) | |
| tree | 86e4c8bba5d0a7915388e00b6631a69601be8330 /fs/ceph/caps.c | |
| parent | 8f2a98ef3c1adf815ce38d5cc2f4e2a8759e98c5 (diff) | |
| download | linux-d6e47819721ae2d9d090058ad5570a66f3c42e39.tar.bz2 | |
ceph: hold i_ceph_lock when removing caps for freeing inode
ceph_d_revalidate(, LOOKUP_RCU) may call __ceph_caps_issued_mask()
on a freeing inode.
Signed-off-by: "Yan, Zheng" <zyan@redhat.com>
Reviewed-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
Diffstat (limited to 'fs/ceph/caps.c')
| -rw-r--r-- | fs/ceph/caps.c | 10 |
1 files changed, 6 insertions, 4 deletions
diff --git a/fs/ceph/caps.c b/fs/ceph/caps.c index 0176241eaea7..7754d7679122 100644 --- a/fs/ceph/caps.c +++ b/fs/ceph/caps.c @@ -1263,20 +1263,22 @@ static int send_cap_msg(struct cap_msg_args *arg) } /* - * Queue cap releases when an inode is dropped from our cache. Since - * inode is about to be destroyed, there is no need for i_ceph_lock. + * Queue cap releases when an inode is dropped from our cache. */ -void __ceph_remove_caps(struct inode *inode) +void __ceph_remove_caps(struct ceph_inode_info *ci) { - struct ceph_inode_info *ci = ceph_inode(inode); struct rb_node *p; + /* lock i_ceph_lock, because ceph_d_revalidate(..., LOOKUP_RCU) + * may call __ceph_caps_issued_mask() on a freeing inode. */ + spin_lock(&ci->i_ceph_lock); p = rb_first(&ci->i_caps); while (p) { struct ceph_cap *cap = rb_entry(p, struct ceph_cap, ci_node); p = rb_next(p); __ceph_remove_cap(cap, true); } + spin_unlock(&ci->i_ceph_lock); } /* |