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rbd: update mapping size only on refresh

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There is no sense in trying to update the mapping size before it's even
been set.

Signed-off-by: Ilya Dryomov <ilya.dryomov@inktank.com>
Reviewed-by: Alex Elder <elder@linaro.org>
This commit is contained in:
Ilya Dryomov 2014-07-23 17:11:21 +04:00
parent 52bb1f9bed
commit 5ff1108ccc
1 changed files with 7 additions and 12 deletions
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19
drivers/block/rbd.c
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@ -971,12 +971,6 @@ static int rbd_header_from_disk(struct rbd_device *rbd_dev,
header->snap_names = snap_names;
header->snap_sizes = snap_sizes;
/* Make sure mapping size is consistent with header info */
if (rbd_dev->spec->snap_id == CEPH_NOSNAP || first_time)
if (rbd_dev->mapping.size != header->image_size)
rbd_dev->mapping.size = header->image_size;
return 0;
out_2big:
ret = -EIO;
@ -3522,9 +3516,14 @@ static int rbd_dev_refresh(struct rbd_device *rbd_dev)
if (ret)
return ret;
/* If it's a mapped snapshot, validate its EXISTS flag */
if (rbd_dev->spec->snap_id == CEPH_NOSNAP) {
if (rbd_dev->mapping.size != rbd_dev->header.image_size)
rbd_dev->mapping.size = rbd_dev->header.image_size;
} else {
/* validate mapped snapshot's EXISTS flag */
rbd_exists_validate(rbd_dev);
}
rbd_exists_validate(rbd_dev);
up_write(&rbd_dev->header_rwsem);
if (mapping_size != rbd_dev->mapping.size) {
@ -4507,10 +4506,6 @@ static int rbd_dev_v2_header_info(struct rbd_device *rbd_dev)
"is EXPERIMENTAL!");
}
if (rbd_dev->spec->snap_id == CEPH_NOSNAP)
if (rbd_dev->mapping.size != rbd_dev->header.image_size)
rbd_dev->mapping.size = rbd_dev->header.image_size;
ret = rbd_dev_v2_snap_context(rbd_dev);
dout("rbd_dev_v2_snap_context returned %d\n", ret);