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ceph: make fsync() wait unsafe requests that created/modified inode

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If we get a unsafe reply for request that created/modified inode,
add the unsafe request to a list in the newly created/modified
inode. So we can make fsync() wait these unsafe requests.

Signed-off-by: Yan, Zheng <zyan@redhat.com>
This commit is contained in:
Yan, Zheng
2015-10-27 18:36:06 +08:00
committed by Ilya Dryomov
parent 4c06ace81a
commit 68cd5b4b76
5 changed files with 54 additions and 38 deletions
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14
fs/ceph/mds_client.c
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@@ -666,6 +666,12 @@ static void __unregister_request(struct ceph_mds_client *mdsc,
list_del_init(&req->r_unsafe_dir_item);
spin_unlock(&ci->i_unsafe_lock);
}
if (req->r_target_inode && req->r_got_unsafe) {
struct ceph_inode_info *ci = ceph_inode(req->r_target_inode);
spin_lock(&ci->i_unsafe_lock);
list_del_init(&req->r_unsafe_target_item);
spin_unlock(&ci->i_unsafe_lock);
}
if (req->r_unsafe_dir) {
iput(req->r_unsafe_dir);
@@ -1707,6 +1713,7 @@ ceph_mdsc_create_request(struct ceph_mds_client *mdsc, int op, int mode)
req->r_started = jiffies;
req->r_resend_mds = -1;
INIT_LIST_HEAD(&req->r_unsafe_dir_item);
INIT_LIST_HEAD(&req->r_unsafe_target_item);
req->r_fmode = -1;
kref_init(&req->r_kref);
INIT_LIST_HEAD(&req->r_wait);
@@ -2529,6 +2536,13 @@ static void handle_reply(struct ceph_mds_session *session, struct ceph_msg *msg)
up_read(&mdsc->snap_rwsem);
if (realm)
ceph_put_snap_realm(mdsc, realm);
if (err == 0 && req->r_got_unsafe && req->r_target_inode) {
struct ceph_inode_info *ci = ceph_inode(req->r_target_inode);
spin_lock(&ci->i_unsafe_lock);
list_add_tail(&req->r_unsafe_target_item, &ci->i_unsafe_iops);
spin_unlock(&ci->i_unsafe_lock);
}
out_err:
mutex_lock(&mdsc->mutex);
if (!req->r_aborted) {