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ceph: check inode caps in ceph_d_revalidate

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Some inodes in readdir reply may have no caps. Getattr mds request
for these inodes can return -ESTALE. The fix is consider dentry that
links to inode with no caps as invalid. Invalid dentry causes a
lookup request to send to the mds, the MDS will send caps back.

Signed-off-by: Yan, Zheng <zheng.z.yan@intel.com>
This commit is contained in:
Yan, Zheng
2013-11-30 12:47:41 +08:00
parent ca18bede04
commit 9215aeea62
3 changed files with 21 additions and 3 deletions
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12
fs/ceph/caps.c
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@@ -891,6 +891,18 @@ static int __ceph_is_any_caps(struct ceph_inode_info *ci)
return !RB_EMPTY_ROOT(&ci->i_caps) || ci->i_cap_exporting_mds >= 0;
}
int ceph_is_any_caps(struct inode *inode)
{
struct ceph_inode_info *ci = ceph_inode(inode);
int ret;
spin_lock(&ci->i_ceph_lock);
ret = __ceph_is_any_caps(ci);
spin_unlock(&ci->i_ceph_lock);
return ret;
}
/*
* Remove a cap. Take steps to deal with a racing iterate_session_caps.
*