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ceph: hold i_ceph_lock when removing caps for freeing inode
commit d6e4781972
upstream.
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>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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parent
9b3c3f8860
commit
13d25588c4
1 changed files with 5 additions and 2 deletions
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@ -1119,20 +1119,23 @@ static int send_cap_msg(struct cap_msg_args *arg)
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}
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/*
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* Queue cap releases when an inode is dropped from our cache. Since
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* inode is about to be destroyed, there is no need for i_ceph_lock.
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* Queue cap releases when an inode is dropped from our cache.
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*/
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void ceph_queue_caps_release(struct inode *inode)
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{
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struct ceph_inode_info *ci = ceph_inode(inode);
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struct rb_node *p;
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/* lock i_ceph_lock, because ceph_d_revalidate(..., LOOKUP_RCU)
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* may call __ceph_caps_issued_mask() on a freeing inode. */
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spin_lock(&ci->i_ceph_lock);
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p = rb_first(&ci->i_caps);
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while (p) {
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struct ceph_cap *cap = rb_entry(p, struct ceph_cap, ci_node);
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p = rb_next(p);
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__ceph_remove_cap(cap, true);
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}
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spin_unlock(&ci->i_ceph_lock);
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}
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/*
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