diff --git a/drivers/block/rbd.c b/drivers/block/rbd.c
index 84ad3b17956f67ddd55508e6eb7d9b23c67ecb1e..632751ddb2870846926391f77986ca1e44a0a5bc 100644
--- a/drivers/block/rbd.c
+++ b/drivers/block/rbd.c
@@ -1334,14 +1334,30 @@ static bool rbd_obj_is_tail(struct rbd_obj_request *obj_req)
/*
* Must be called after rbd_obj_calc_img_extents().
*/
-static bool rbd_obj_copyup_enabled(struct rbd_obj_request *obj_req)
+static void rbd_obj_set_copyup_enabled(struct rbd_obj_request *obj_req)
{
- if (!obj_req->num_img_extents ||
- (rbd_obj_is_entire(obj_req) &&
- !obj_req->img_request->snapc->num_snaps))
- return false;
+ rbd_assert(obj_req->img_request->snapc);
- return true;
+ if (obj_req->img_request->op_type == OBJ_OP_DISCARD) {
+ dout("%s %p objno %llu discard\n", __func__, obj_req,
+ obj_req->ex.oe_objno);
+ return;
+ }
+
+ if (!obj_req->num_img_extents) {
+ dout("%s %p objno %llu not overlapping\n", __func__, obj_req,
+ obj_req->ex.oe_objno);
+ return;
+ }
+
+ if (rbd_obj_is_entire(obj_req) &&
+ !obj_req->img_request->snapc->num_snaps) {
+ dout("%s %p objno %llu entire\n", __func__, obj_req,
+ obj_req->ex.oe_objno);
+ return;
+ }
+
+ obj_req->flags |= RBD_OBJ_FLAG_COPYUP_ENABLED;
}
static u64 rbd_obj_img_extents_bytes(struct rbd_obj_request *obj_req)
@@ -1442,6 +1458,7 @@ __rbd_obj_add_osd_request(struct rbd_obj_request *obj_req,
static struct ceph_osd_request *
rbd_obj_add_osd_request(struct rbd_obj_request *obj_req, int num_ops)
{
+ rbd_assert(obj_req->img_request->snapc);
return __rbd_obj_add_osd_request(obj_req, obj_req->img_request->snapc,
num_ops);
}
@@ -1578,15 +1595,18 @@ static void rbd_img_request_init(struct rbd_img_request *img_request,
mutex_init(&img_request->state_mutex);
}
+/*
+ * Only snap_id is captured here, for reads. For writes, snapshot
+ * context is captured in rbd_img_object_requests() after exclusive
+ * lock is ensured to be held.
+ */
static void rbd_img_capture_header(struct rbd_img_request *img_req)
{
struct rbd_device *rbd_dev = img_req->rbd_dev;
lockdep_assert_held(&rbd_dev->header_rwsem);
- if (rbd_img_is_write(img_req))
- img_req->snapc = ceph_get_snap_context(rbd_dev->header.snapc);
- else
+ if (!rbd_img_is_write(img_req))
img_req->snap_id = rbd_dev->spec->snap_id;
if (rbd_dev_parent_get(rbd_dev))
@@ -2233,9 +2253,6 @@ static int rbd_obj_init_write(struct rbd_obj_request *obj_req)
if (ret)
return ret;
- if (rbd_obj_copyup_enabled(obj_req))
- obj_req->flags |= RBD_OBJ_FLAG_COPYUP_ENABLED;
-
obj_req->write_state = RBD_OBJ_WRITE_START;
return 0;
}
@@ -2341,8 +2358,6 @@ static int rbd_obj_init_zeroout(struct rbd_obj_request *obj_req)
if (ret)
return ret;
- if (rbd_obj_copyup_enabled(obj_req))
- obj_req->flags |= RBD_OBJ_FLAG_COPYUP_ENABLED;
if (!obj_req->num_img_extents) {
obj_req->flags |= RBD_OBJ_FLAG_NOOP_FOR_NONEXISTENT;
if (rbd_obj_is_entire(obj_req))
@@ -3286,6 +3301,7 @@ static bool rbd_obj_advance_write(struct rbd_obj_request *obj_req, int *result)
case RBD_OBJ_WRITE_START:
rbd_assert(!*result);
+ rbd_obj_set_copyup_enabled(obj_req);
if (rbd_obj_write_is_noop(obj_req))
return true;
@@ -3472,9 +3488,19 @@ static int rbd_img_exclusive_lock(struct rbd_img_request *img_req)
static void rbd_img_object_requests(struct rbd_img_request *img_req)
{
+ struct rbd_device *rbd_dev = img_req->rbd_dev;
struct rbd_obj_request *obj_req;
rbd_assert(!img_req->pending.result && !img_req->pending.num_pending);
+ rbd_assert(!need_exclusive_lock(img_req) ||
+ __rbd_is_lock_owner(rbd_dev));
+
+ if (rbd_img_is_write(img_req)) {
+ rbd_assert(!img_req->snapc);
+ down_read(&rbd_dev->header_rwsem);
+ img_req->snapc = ceph_get_snap_context(rbd_dev->header.snapc);
+ up_read(&rbd_dev->header_rwsem);
+ }
for_each_obj_request(img_req, obj_req) {
int result = 0;
@@ -3492,7 +3518,6 @@ static void rbd_img_object_requests(struct rbd_img_request *img_req)
static bool rbd_img_advance(struct rbd_img_request *img_req, int *result)
{
- struct rbd_device *rbd_dev = img_req->rbd_dev;
int ret;
again:
@@ -3513,9 +3538,6 @@ static bool rbd_img_advance(struct rbd_img_request *img_req, int *result)
if (*result)
return true;
- rbd_assert(!need_exclusive_lock(img_req) ||
- __rbd_is_lock_owner(rbd_dev));
-
rbd_img_object_requests(img_req);
if (!img_req->pending.num_pending) {
*result = img_req->pending.result;
@@ -3977,6 +3999,10 @@ static int rbd_post_acquire_action(struct rbd_device *rbd_dev)
{
int ret;
+ ret = rbd_dev_refresh(rbd_dev);
+ if (ret)
+ return ret;
+
if (rbd_dev->header.features & RBD_FEATURE_OBJECT_MAP) {
ret = rbd_object_map_open(rbd_dev);
if (ret)
diff --git a/fs/ceph/caps.c b/fs/ceph/caps.c
index 789be30d6ee2203fa202760fb887ee34ee2277e7..2321e5ddb664de661549baf52c79857ffb7e2e18 100644
--- a/fs/ceph/caps.c
+++ b/fs/ceph/caps.c
@@ -1627,6 +1627,7 @@ void ceph_flush_snaps(struct ceph_inode_info *ci,
struct inode *inode = &ci->netfs.inode;
struct ceph_mds_client *mdsc = ceph_inode_to_client(inode)->mdsc;
struct ceph_mds_session *session = NULL;
+ bool need_put = false;
int mds;
dout("ceph_flush_snaps %p\n", inode);
@@ -1671,8 +1672,13 @@ void ceph_flush_snaps(struct ceph_inode_info *ci,
ceph_put_mds_session(session);
/* we flushed them all; remove this inode from the queue */
spin_lock(&mdsc->snap_flush_lock);
+ if (!list_empty(&ci->i_snap_flush_item))
+ need_put = true;
list_del_init(&ci->i_snap_flush_item);
spin_unlock(&mdsc->snap_flush_lock);
+
+ if (need_put)
+ iput(inode);
}
/*
diff --git a/fs/ceph/snap.c b/fs/ceph/snap.c
index 0b236ebd989fcae8853e1af3bbaf2c9f00d4f0e4..2e73ba62bd7aa73f6c0f39964d65b5aaf1ff05a2 100644
--- a/fs/ceph/snap.c
+++ b/fs/ceph/snap.c
@@ -693,8 +693,10 @@ int __ceph_finish_cap_snap(struct ceph_inode_info *ci,
capsnap->size);
spin_lock(&mdsc->snap_flush_lock);
- if (list_empty(&ci->i_snap_flush_item))
+ if (list_empty(&ci->i_snap_flush_item)) {
+ ihold(inode);
list_add_tail(&ci->i_snap_flush_item, &mdsc->snap_flush_list);
+ }
spin_unlock(&mdsc->snap_flush_lock);
return 1; /* caller may want to ceph_flush_snaps */
}