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| author | Alex Elder <elder@inktank.com> | 2012-10-26 06:34:40 +0200 |
|---|---|---|
| committer | Alex Elder <elder@inktank.com> | 2012-10-30 14:34:28 +0100 |
| commit | 41f38c2b2f8b66b176a0e548ef06294343a7bfa2 (patch) | |
| tree | 6d577c2ac2a8a7b3fca878d9030dc9faa6226e4a | |
| parent | rbd: simplify rbd_rq_fn() (diff) | |
| download | linux-41f38c2b2f8b66b176a0e548ef06294343a7bfa2.tar.xz linux-41f38c2b2f8b66b176a0e548ef06294343a7bfa2.zip | |
rbd: remove snapshots on error in rbd_add()
If rbd_dev_snaps_update() has ever been called for an rbd device
structure there could be snapshot structures on its snaps list.
In rbd_add(), this function is called but a subsequent error
path neglected to clean up any of these snapshots.
Add a call to rbd_remove_all_snaps() in the appropriate spot to
remedy this. Change a couple of error labels to be a little
clearer while there.
Drop the leading underscores from the function name; there's nothing
special about that function that they might signify. As suggested
in review, the leading underscores in __rbd_remove_snap_dev() have
been removed as well.
Signed-off-by: Alex Elder <elder@inktank.com>
Reviewed-by: Josh Durgin <josh.durgin@inktank.com>
| -rw-r--r-- | drivers/block/rbd.c | 20 |
1 files changed, 11 insertions, 9 deletions
diff --git a/drivers/block/rbd.c b/drivers/block/rbd.c index cc06c55875b9..c7681d46cf86 100644 --- a/drivers/block/rbd.c +++ b/drivers/block/rbd.c @@ -228,7 +228,7 @@ static int rbd_dev_snaps_update(struct rbd_device *rbd_dev); static int rbd_dev_snaps_register(struct rbd_device *rbd_dev); static void rbd_dev_release(struct device *dev); -static void __rbd_remove_snap_dev(struct rbd_snap *snap); +static void rbd_remove_snap_dev(struct rbd_snap *snap); static ssize_t rbd_add(struct bus_type *bus, const char *buf, size_t count); @@ -1787,13 +1787,13 @@ static int rbd_read_header(struct rbd_device *rbd_dev, return ret; } -static void __rbd_remove_all_snaps(struct rbd_device *rbd_dev) +static void rbd_remove_all_snaps(struct rbd_device *rbd_dev) { struct rbd_snap *snap; struct rbd_snap *next; list_for_each_entry_safe(snap, next, &rbd_dev->snaps, node) - __rbd_remove_snap_dev(snap); + rbd_remove_snap_dev(snap); } static void rbd_update_mapping_size(struct rbd_device *rbd_dev) @@ -2146,7 +2146,7 @@ static bool rbd_snap_registered(struct rbd_snap *snap) return ret; } -static void __rbd_remove_snap_dev(struct rbd_snap *snap) +static void rbd_remove_snap_dev(struct rbd_snap *snap) { list_del(&snap->node); if (device_is_registered(&snap->dev)) @@ -2569,7 +2569,7 @@ static int rbd_dev_snaps_update(struct rbd_device *rbd_dev) if (rbd_dev->mapping.snap_id == snap->id) rbd_dev->mapping.snap_exists = false; - __rbd_remove_snap_dev(snap); + rbd_remove_snap_dev(snap); dout("%ssnap id %llu has been removed\n", rbd_dev->mapping.snap_id == snap->id ? "mapped " : "", @@ -3179,11 +3179,11 @@ static ssize_t rbd_add(struct bus_type *bus, /* no need to lock here, as rbd_dev is not registered yet */ rc = rbd_dev_snaps_update(rbd_dev); if (rc) - goto err_out_header; + goto err_out_probe; rc = rbd_dev_set_mapping(rbd_dev, snap_name); if (rc) - goto err_out_header; + goto err_out_snaps; /* generate unique id: find highest unique id, add one */ rbd_dev_id_get(rbd_dev); @@ -3247,7 +3247,9 @@ err_out_blkdev: unregister_blkdev(rbd_dev->major, rbd_dev->name); err_out_id: rbd_dev_id_put(rbd_dev); -err_out_header: +err_out_snaps: + rbd_remove_all_snaps(rbd_dev); +err_out_probe: rbd_header_free(&rbd_dev->header); err_out_client: kfree(rbd_dev->header_name); @@ -3345,7 +3347,7 @@ static ssize_t rbd_remove(struct bus_type *bus, goto done; } - __rbd_remove_all_snaps(rbd_dev); + rbd_remove_all_snaps(rbd_dev); rbd_bus_del_dev(rbd_dev); done: |