diff options
| author | Alex Elder <elder@inktank.com> | 2013-05-16 15:04:20 -0500 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2013-06-20 12:01:28 -0700 |
| commit | 528a7a8bf60a2a2aa3c10a6f1e6c03b4fd1f1f09 (patch) | |
| tree | da9975a9704a35f987580fd8a0c431247c56269f | |
| parent | 4a798296068abd043608c10ccb69209a7c2f0579 (diff) | |
rbd: don't destroy ceph_opts in rbd_add()
commit 7262cfca430a1a0e0707149af29ae86bc0ded230 upstream.
Whether rbd_client_create() successfully creates a new client or
not, it takes responsibility for getting the ceph_opts structure
it's passed destroyed. If successful, the structure becomes
associated with the created client; if not, rbd_client_create()
will destroy it.
Previously, rbd_get_client() would call ceph_destroy_options()
if rbd_get_client() failed, and that meant it got called twice.
That led freeing various pointers more than once, which is never a
good idea.
This resolves:
http://tracker.ceph.com/issues/4559
Reported-by: Dan van der Ster <dan@vanderster.com>
Signed-off-by: Alex Elder <elder@inktank.com>
Reviewed-by: Josh Durgin <josh.durgin@inktank.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | drivers/block/rbd.c | 10 |
1 files changed, 4 insertions, 6 deletions
diff --git a/drivers/block/rbd.c b/drivers/block/rbd.c index b7b7a88d9f68..fe333e4b731e 100644 --- a/drivers/block/rbd.c +++ b/drivers/block/rbd.c @@ -435,8 +435,8 @@ static const struct block_device_operations rbd_bd_ops = { }; /* - * Initialize an rbd client instance. - * We own *ceph_opts. + * Initialize an rbd client instance. Success or not, this function + * consumes ceph_opts. */ static struct rbd_client *rbd_client_create(struct ceph_options *ceph_opts) { @@ -583,7 +583,8 @@ static int parse_rbd_opts_token(char *c, void *private) /* * Get a ceph client with specific addr and configuration, if one does - * not exist create it. + * not exist create it. Either way, ceph_opts is consumed by this + * function. */ static struct rbd_client *rbd_get_client(struct ceph_options *ceph_opts) { @@ -4104,7 +4105,6 @@ static ssize_t rbd_add(struct bus_type *bus, rc = PTR_ERR(rbdc); goto err_out_args; } - ceph_opts = NULL; /* rbd_dev client now owns this */ /* pick the pool */ osdc = &rbdc->client->osdc; @@ -4140,8 +4140,6 @@ err_out_rbd_dev: err_out_client: rbd_put_client(rbdc); err_out_args: - if (ceph_opts) - ceph_destroy_options(ceph_opts); kfree(rbd_opts); rbd_spec_put(spec); err_out_module: |