| Message ID | 51885A19.7030905@inktank.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
Alex Elder <elder@inktank.com> wrote: >This commit: > d98df63e rbd: revalidate_disk upon rbd resize >instituted a call to revalidate_disk() to notify interested parties >that a mapped image has changed size. This works well, as long as >the the rbd device doesn't map a snapshot. > >A snapshot will never change size. However, the base image the >snapshot is associated with can, and it can do so while the snapshot >is mapped. > >The problem is that the test for the size is looking at the size of >the base image, not the size of the mapped snapshot. This patch >corrects that. > >Update the warning message shown in the event of error, and move >it into the callers. > >This resolves: > http://tracker.ceph.com/issues/4911 > >Signed-off-by: Alex Elder <elder@inktank.com> >--- > drivers/block/rbd.c | 16 +++++++++------- > 1 file changed, 9 insertions(+), 7 deletions(-) > >diff --git a/drivers/block/rbd.c b/drivers/block/rbd.c >index 4263743..5d5e3f0 100644 >--- a/drivers/block/rbd.c >+++ b/drivers/block/rbd.c >@@ -2628,6 +2628,7 @@ out: >static void rbd_watch_cb(u64 ver, u64 notify_id, u8 opcode, void *data) > { > struct rbd_device *rbd_dev = (struct rbd_device *)data; >+ int ret; > > if (!rbd_dev) > return; >@@ -2635,7 +2636,9 @@ static void rbd_watch_cb(u64 ver, u64 notify_id, >u8 opcode, void *data) > dout("%s: \"%s\" notify_id %llu opcode %u\n", __func__, > rbd_dev->header_name, (unsigned long long)notify_id, > (unsigned int)opcode); >- (void)rbd_dev_refresh(rbd_dev); >+ ret = rbd_dev_refresh(rbd_dev); >+ if (ret) >+ rbd_warn(rbd_dev, ": header refresh error (%d)\n", ret); > > rbd_obj_notify_ack(rbd_dev, notify_id); > } >@@ -3182,11 +3185,11 @@ static void rbd_exists_validate(struct >rbd_device *rbd_dev) > > static int rbd_dev_refresh(struct rbd_device *rbd_dev) > { >- u64 image_size; >+ u64 mapping_size; > int ret; > > rbd_assert(rbd_image_format_valid(rbd_dev->image_format)); >- image_size = rbd_dev->header.image_size; >+ mapping_size = rbd_dev->mapping.size; > mutex_lock_nested(&ctl_mutex, SINGLE_DEPTH_NESTING); > if (rbd_dev->image_format == 1) > ret = rbd_dev_v1_refresh(rbd_dev); >@@ -3197,10 +3200,7 @@ static int rbd_dev_refresh(struct rbd_device >*rbd_dev) > > rbd_exists_validate(rbd_dev); > mutex_unlock(&ctl_mutex); >- if (ret) >- rbd_warn(rbd_dev, "got notification but failed to " >- " update snaps: %d\n", ret); >- if (image_size != rbd_dev->header.image_size) >+ if (mapping_size != rbd_dev->mapping.size) > revalidate_disk(rbd_dev->disk); > > return ret; >@@ -3405,6 +3405,8 @@ static ssize_t rbd_image_refresh(struct device >*dev, > int ret; > > ret = rbd_dev_refresh(rbd_dev); >+ if (ret) >+ rbd_warn(rbd_dev, ": manual header refresh error (%d)\n", ret); > > return ret < 0 ? ret : size; > } Reviewed-by: Josh Durgin <josh.durgin@inktank.com> -- To unsubscribe from this list: send the line "unsubscribe ceph-devel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
diff --git a/drivers/block/rbd.c b/drivers/block/rbd.c index 4263743..5d5e3f0 100644 --- a/drivers/block/rbd.c +++ b/drivers/block/rbd.c @@ -2628,6 +2628,7 @@ out: static void rbd_watch_cb(u64 ver, u64 notify_id, u8 opcode, void *data) { struct rbd_device *rbd_dev = (struct rbd_device *)data; + int ret; if (!rbd_dev) return; @@ -2635,7 +2636,9 @@ static void rbd_watch_cb(u64 ver, u64 notify_id, u8 opcode, void *data) dout("%s: \"%s\" notify_id %llu opcode %u\n", __func__, rbd_dev->header_name, (unsigned long long)notify_id, (unsigned int)opcode); - (void)rbd_dev_refresh(rbd_dev); + ret = rbd_dev_refresh(rbd_dev); + if (ret) + rbd_warn(rbd_dev, ": header refresh error (%d)\n", ret); rbd_obj_notify_ack(rbd_dev, notify_id);
This commit: d98df63e rbd: revalidate_disk upon rbd resize instituted a call to revalidate_disk() to notify interested parties that a mapped image has changed size. This works well, as long as the the rbd device doesn't map a snapshot. A snapshot will never change size. However, the base image the snapshot is associated with can, and it can do so while the snapshot is mapped. The problem is that the test for the size is looking at the size of the base image, not the size of the mapped snapshot. This patch corrects that. Update the warning message shown in the event of error, and move it into the callers. This resolves: http://tracker.ceph.com/issues/4911 Signed-off-by: Alex Elder <elder@inktank.com> --- drivers/block/rbd.c | 16 +++++++++------- 1 file changed, 9 insertions(+), 7 deletions(-) } @@ -3182,11 +3185,11 @@ static void rbd_exists_validate(struct rbd_device *rbd_dev) static int rbd_dev_refresh(struct rbd_device *rbd_dev) { - u64 image_size; + u64 mapping_size; int ret; rbd_assert(rbd_image_format_valid(rbd_dev->image_format)); - image_size = rbd_dev->header.image_size; + mapping_size = rbd_dev->mapping.size; mutex_lock_nested(&ctl_mutex, SINGLE_DEPTH_NESTING); if (rbd_dev->image_format == 1) ret = rbd_dev_v1_refresh(rbd_dev); @@ -3197,10 +3200,7 @@ static int rbd_dev_refresh(struct rbd_device *rbd_dev) rbd_exists_validate(rbd_dev); mutex_unlock(&ctl_mutex); - if (ret) - rbd_warn(rbd_dev, "got notification but failed to " - " update snaps: %d\n", ret); - if (image_size != rbd_dev->header.image_size) + if (mapping_size != rbd_dev->mapping.size) revalidate_disk(rbd_dev->disk); return ret; @@ -3405,6 +3405,8 @@ static ssize_t rbd_image_refresh(struct device *dev, int ret; ret = rbd_dev_refresh(rbd_dev); + if (ret) + rbd_warn(rbd_dev, ": manual header refresh error (%d)\n", ret); return ret < 0 ? ret : size; }