[PATCH] nfs-utils: calculate stripe device size during process phase

[PATCH] nfs-utils: calculate stripe device size during process phase

[Jim Rees]

If a device has stripe device components, the total size will be wrong.
Calculate the stripe device size earlier, during the process phase, so that
later devices will have the correct size.

Signed-off-by: Jim Rees <rees@umich.edu>
---
 utils/blkmapd/device-process.c |    3 ++-
 utils/blkmapd/dm-device.c      |    2 +-
 2 files changed, 3 insertions(+), 2 deletions(-)

diff --git a/utils/blkmapd/device-process.c b/utils/blkmapd/device-process.c
index b709b48..9a78457 100644
--- a/utils/blkmapd/device-process.c
+++ b/utils/blkmapd/device-process.c
@@ -318,7 +318,8 @@ decode_blk_volume(uint32_t **pp, uint32_t *end, struct bl_volume *vols, int voln
 			}
 		}
 		/* Truncate size to a stripe unit boundary */
-		vol->bv_size = vol->bv_vols[0]->bv_size & ~(chunksize - 1);
+		vol->bv_size = vol->bv_vols[0]->bv_size * vol->bv_vol_n;
+		vol->bv_size &= ~(chunksize - 1);
 		break;
 	case BLOCK_VOLUME_CONCAT:
 		BLK_READBUF(p, end, 4);
diff --git a/utils/blkmapd/dm-device.c b/utils/blkmapd/dm-device.c
index 2e87db8..c4fe4e9 100644
--- a/utils/blkmapd/dm-device.c
+++ b/utils/blkmapd/dm-device.c
@@ -418,7 +418,7 @@ uint64_t dm_device_create(struct bl_volume *vols, int num_vols)
 			stripe_size = stripe_unit * node->bv_vol_n;
 			nstripes = node->bv_size * node->bv_vol_n / stripe_size;
 			/* Make sure total size is a multiple of stripe size */
-			size = node->bv_size * node->bv_vol_n;
+			size = node->bv_size;
 			if (size % stripe_size != 0) {
 				/* XXX Should this be an error? */
 				BL_LOG_WARNING(
-- 
1.7.1

Re: [PATCH] nfs-utils: calculate stripe device size during process phase

[Benny Halevy]

Merged.  Thanks!

Benny

On 2011-02-14 14:32, Jim Rees wrote:
> If a device has stripe device components, the total size will be wrong.
> Calculate the stripe device size earlier, during the process phase, so that
> later devices will have the correct size.
> 
> Signed-off-by: Jim Rees <rees@umich.edu>
> ---
>  utils/blkmapd/device-process.c |    3 ++-
>  utils/blkmapd/dm-device.c      |    2 +-
>  2 files changed, 3 insertions(+), 2 deletions(-)
> 
> diff --git a/utils/blkmapd/device-process.c b/utils/blkmapd/device-process.c
> index b709b48..9a78457 100644
> --- a/utils/blkmapd/device-process.c
> +++ b/utils/blkmapd/device-process.c
> @@ -318,7 +318,8 @@ decode_blk_volume(uint32_t **pp, uint32_t *end, struct bl_volume *vols, int voln
>  			}
>  		}
>  		/* Truncate size to a stripe unit boundary */
> -		vol->bv_size = vol->bv_vols[0]->bv_size & ~(chunksize - 1);
> +		vol->bv_size = vol->bv_vols[0]->bv_size * vol->bv_vol_n;
> +		vol->bv_size &= ~(chunksize - 1);
>  		break;
>  	case BLOCK_VOLUME_CONCAT:
>  		BLK_READBUF(p, end, 4);
> diff --git a/utils/blkmapd/dm-device.c b/utils/blkmapd/dm-device.c
> index 2e87db8..c4fe4e9 100644
> --- a/utils/blkmapd/dm-device.c
> +++ b/utils/blkmapd/dm-device.c
> @@ -418,7 +418,7 @@ uint64_t dm_device_create(struct bl_volume *vols, int num_vols)
>  			stripe_size = stripe_unit * node->bv_vol_n;
>  			nstripes = node->bv_size * node->bv_vol_n / stripe_size;
>  			/* Make sure total size is a multiple of stripe size */
> -			size = node->bv_size * node->bv_vol_n;
> +			size = node->bv_size;
>  			if (size % stripe_size != 0) {
>  				/* XXX Should this be an error? */
>  				BL_LOG_WARNING(