From 8b0241f85ab11c87075f9de0191acd8b546c6f6a Mon Sep 17 00:00:00 2001 From: Alex Elder Date: Thu, 25 Apr 2013 23:15:08 -0500 Subject: [PATCH] rbd: have snap_by_name() return a snapshot A function called snap_by_name() ought to just look up a snapshot by name. It does that, but then it assigns some stuff to the rbd device structure as well. Change the function to do just the lookup, and have the caller do the assignments that follow. Signed-off-by: Alex Elder Reviewed-by: Josh Durgin --- drivers/block/rbd.c | 35 +++++++++++++++-------------------- 1 file changed, 15 insertions(+), 20 deletions(-) diff --git a/drivers/block/rbd.c b/drivers/block/rbd.c index 815c174661a8..6b1e9a9f2f72 100644 --- a/drivers/block/rbd.c +++ b/drivers/block/rbd.c @@ -830,44 +830,39 @@ static const char *rbd_snap_name(struct rbd_device *rbd_dev, u64 snap_id) return NULL; } -static int snap_by_name(struct rbd_device *rbd_dev, const char *snap_name) +static struct rbd_snap *snap_by_name(struct rbd_device *rbd_dev, + const char *snap_name) { - struct rbd_snap *snap; - list_for_each_entry(snap, &rbd_dev->snaps, node) { - if (!strcmp(snap_name, snap->name)) { - rbd_dev->spec->snap_id = snap->id; - rbd_dev->mapping.size = snap->size; - rbd_dev->mapping.features = snap->features; - - return 0; - } - } + list_for_each_entry(snap, &rbd_dev->snaps, node) + if (!strcmp(snap_name, snap->name)) + return snap; - return -ENOENT; + return NULL; } static int rbd_dev_set_mapping(struct rbd_device *rbd_dev) { - int ret; - if (!memcmp(rbd_dev->spec->snap_name, RBD_SNAP_HEAD_NAME, sizeof (RBD_SNAP_HEAD_NAME))) { rbd_dev->spec->snap_id = CEPH_NOSNAP; rbd_dev->mapping.size = rbd_dev->header.image_size; rbd_dev->mapping.features = rbd_dev->header.features; - ret = 0; } else { - ret = snap_by_name(rbd_dev, rbd_dev->spec->snap_name); - if (ret < 0) - goto done; + struct rbd_snap *snap; + + snap = snap_by_name(rbd_dev, rbd_dev->spec->snap_name); + if (!snap) + return -ENOENT; + rbd_dev->spec->snap_id = snap->id; + rbd_dev->mapping.size = snap->size; + rbd_dev->mapping.features = snap->features; rbd_dev->mapping.read_only = true; } set_bit(RBD_DEV_FLAG_EXISTS, &rbd_dev->flags); -done: - return ret; + return 0; } static void rbd_header_free(struct rbd_image_header *header) -- 2.30.2