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-rw-r--r--fs/ceph/export.c9
1 files changed, 8 insertions, 1 deletions
diff --git a/fs/ceph/export.c b/fs/ceph/export.c
index 79dc06881e78..e088843a7734 100644
--- a/fs/ceph/export.c
+++ b/fs/ceph/export.c
@@ -172,9 +172,16 @@ struct inode *ceph_lookup_inode(struct super_block *sb, u64 ino)
static struct dentry *__fh_to_dentry(struct super_block *sb, u64 ino)
{
struct inode *inode = __lookup_inode(sb, ino);
+ int err;
+
if (IS_ERR(inode))
return ERR_CAST(inode);
- if (inode->i_nlink == 0) {
+ /* We need LINK caps to reliably check i_nlink */
+ err = ceph_do_getattr(inode, CEPH_CAP_LINK_SHARED, false);
+ if (err)
+ return ERR_PTR(err);
+ /* -ESTALE if inode as been unlinked and no file is open */
+ if ((inode->i_nlink == 0) && (atomic_read(&inode->i_count) == 1)) {
iput(inode);
return ERR_PTR(-ESTALE);
}