diff options
| -rw-r--r-- | drivers/block/rbd.c | 25 |
1 files changed, 15 insertions, 10 deletions
diff --git a/drivers/block/rbd.c b/drivers/block/rbd.c index d84b534..8cb8e0a 100644 --- a/drivers/block/rbd.c +++ b/drivers/block/rbd.c @@ -2304,26 +2304,28 @@ static int rbd_init_watch_dev(struct rbd_device *rbd_dev) return ret; } -static atomic64_t rbd_id_max = ATOMIC64_INIT(0); +static atomic64_t rbd_dev_id_max = ATOMIC64_INIT(0); /* * Get a unique rbd identifier for the given new rbd_dev, and add * the rbd_dev to the global list. The minimum rbd id is 1. */ -static void rbd_id_get(struct rbd_device *rbd_dev) +static void rbd_dev_id_get(struct rbd_device *rbd_dev) { - rbd_dev->dev_id = atomic64_inc_return(&rbd_id_max); + rbd_dev->dev_id = atomic64_inc_return(&rbd_dev_id_max); spin_lock(&rbd_dev_list_lock); list_add_tail(&rbd_dev->node, &rbd_dev_list); spin_unlock(&rbd_dev_list_lock); + dout("rbd_dev %p given dev id %llu\n", rbd_dev, + (unsigned long long) rbd_dev->dev_id); } /* * Remove an rbd_dev from the global list, and record that its * identifier is no longer in use. */ -static void rbd_id_put(struct rbd_device *rbd_dev) +static void rbd_dev_id_put(struct rbd_device *rbd_dev) { struct list_head *tmp; int rbd_id = rbd_dev->dev_id; @@ -2331,6 +2333,8 @@ static void rbd_id_put(struct rbd_device *rbd_dev) rbd_assert(rbd_id > 0); + dout("rbd_dev %p released dev id %llu\n", rbd_dev, + (unsigned long long) rbd_dev->dev_id); spin_lock(&rbd_dev_list_lock); list_del_init(&rbd_dev->node); @@ -2338,7 +2342,7 @@ static void rbd_id_put(struct rbd_device *rbd_dev) * If the id being "put" is not the current maximum, there * is nothing special we need to do. */ - if (rbd_id != atomic64_read(&rbd_id_max)) { + if (rbd_id != atomic64_read(&rbd_dev_id_max)) { spin_unlock(&rbd_dev_list_lock); return; } @@ -2359,12 +2363,13 @@ static void rbd_id_put(struct rbd_device *rbd_dev) spin_unlock(&rbd_dev_list_lock); /* - * The max id could have been updated by rbd_id_get(), in + * The max id could have been updated by rbd_dev_id_get(), in * which case it now accurately reflects the new maximum. * Be careful not to overwrite the maximum value in that * case. */ - atomic64_cmpxchg(&rbd_id_max, rbd_id, max_id); + atomic64_cmpxchg(&rbd_dev_id_max, rbd_id, max_id); + dout(" max dev id has been reset\n"); } /* @@ -2563,7 +2568,7 @@ static ssize_t rbd_add(struct bus_type *bus, init_rwsem(&rbd_dev->header_rwsem); /* generate unique id: find highest unique id, add one */ - rbd_id_get(rbd_dev); + rbd_dev_id_get(rbd_dev); /* Fill in the device name, now that we have its id. */ BUILD_BUG_ON(DEV_NAME_LEN @@ -2631,7 +2636,7 @@ err_put_id: kfree(rbd_dev->image_name); kfree(rbd_dev->pool_name); } - rbd_id_put(rbd_dev); + rbd_dev_id_put(rbd_dev); err_nomem: kfree(rbd_dev); kfree(options); @@ -2683,7 +2688,7 @@ static void rbd_dev_release(struct device *dev) kfree(rbd_dev->header_name); kfree(rbd_dev->pool_name); kfree(rbd_dev->image_name); - rbd_id_put(rbd_dev); + rbd_dev_id_put(rbd_dev); kfree(rbd_dev); /* release module ref */ |
