From 39a611a3e035e148257af314a522a6cd169c2d0e Mon Sep 17 00:00:00 2001 From: Jeff Cody Date: Wed, 12 Feb 2014 14:46:24 -0500 Subject: block: Don't throw away errno via error_setg There are a handful of places in the block layer where a failure path has a valid -errno value, yet error_setg() is used. Those instances should instead use error_setg_errno(), to preserve as much error information as possible. This patch replaces those instances with error_setg_errno(), so that errno is passed up the stack in the error message. Reported-By: Kevin Wolf Signed-off-by: Jeff Cody Reviewed-by: Eric Blake Reviewed-by: Fam Zheng Reviewed-by: Kevin Wolf Signed-off-by: Stefan Hajnoczi --- block/mirror.c | 13 +++++++++---- block/qcow2-snapshot.c | 8 +++++--- block/vmdk.c | 6 +++--- 3 files changed, 17 insertions(+), 10 deletions(-) (limited to 'block') diff --git a/block/mirror.c b/block/mirror.c index 2a4333474e..26d18e44d7 100644 --- a/block/mirror.c +++ b/block/mirror.c @@ -633,6 +633,7 @@ void commit_active_start(BlockDriverState *bs, BlockDriverState *base, { int64_t length, base_length; int orig_base_flags; + int ret; orig_base_flags = bdrv_get_flags(base); @@ -642,19 +643,23 @@ void commit_active_start(BlockDriverState *bs, BlockDriverState *base, length = bdrv_getlength(bs); if (length < 0) { - error_setg(errp, "Unable to determine length of %s", bs->filename); + error_setg_errno(errp, -length, + "Unable to determine length of %s", bs->filename); goto error_restore_flags; } base_length = bdrv_getlength(base); if (base_length < 0) { - error_setg(errp, "Unable to determine length of %s", base->filename); + error_setg_errno(errp, -base_length, + "Unable to determine length of %s", base->filename); goto error_restore_flags; } if (length > base_length) { - if (bdrv_truncate(base, length) < 0) { - error_setg(errp, "Top image %s is larger than base image %s, and " + ret = bdrv_truncate(base, length); + if (ret < 0) { + error_setg_errno(errp, -ret, + "Top image %s is larger than base image %s, and " "resize of base image failed", bs->filename, base->filename); goto error_restore_flags; diff --git a/block/qcow2-snapshot.c b/block/qcow2-snapshot.c index ad8bf3dcd9..2fc6320aa1 100644 --- a/block/qcow2-snapshot.c +++ b/block/qcow2-snapshot.c @@ -606,7 +606,8 @@ int qcow2_snapshot_delete(BlockDriverState *bs, s->nb_snapshots--; ret = qcow2_write_snapshots(bs); if (ret < 0) { - error_setg(errp, "Failed to remove snapshot from snapshot list"); + error_setg_errno(errp, -ret, + "Failed to remove snapshot from snapshot list"); return ret; } @@ -624,7 +625,7 @@ int qcow2_snapshot_delete(BlockDriverState *bs, ret = qcow2_update_snapshot_refcount(bs, sn.l1_table_offset, sn.l1_size, -1); if (ret < 0) { - error_setg(errp, "Failed to free the cluster and L1 table"); + error_setg_errno(errp, -ret, "Failed to free the cluster and L1 table"); return ret; } qcow2_free_clusters(bs, sn.l1_table_offset, sn.l1_size * sizeof(uint64_t), @@ -633,7 +634,8 @@ int qcow2_snapshot_delete(BlockDriverState *bs, /* must update the copied flag on the current cluster offsets */ ret = qcow2_update_snapshot_refcount(bs, s->l1_table_offset, s->l1_size, 0); if (ret < 0) { - error_setg(errp, "Failed to update snapshot status in disk"); + error_setg_errno(errp, -ret, + "Failed to update snapshot status in disk"); return ret; } diff --git a/block/vmdk.c b/block/vmdk.c index e809e2ef46..ff6f5ee911 100644 --- a/block/vmdk.c +++ b/block/vmdk.c @@ -1502,7 +1502,7 @@ static int vmdk_create_extent(const char *filename, int64_t filesize, if (flat) { ret = bdrv_truncate(bs, filesize); if (ret < 0) { - error_setg(errp, "Could not truncate file"); + error_setg_errno(errp, -ret, "Could not truncate file"); } goto exit; } @@ -1562,7 +1562,7 @@ static int vmdk_create_extent(const char *filename, int64_t filesize, ret = bdrv_truncate(bs, le64_to_cpu(header.grain_offset) << 9); if (ret < 0) { - error_setg(errp, "Could not truncate file"); + error_setg_errno(errp, -ret, "Could not truncate file"); goto exit; } @@ -1846,7 +1846,7 @@ static int vmdk_create(const char *filename, QEMUOptionParameter *options, if (desc_offset == 0) { ret = bdrv_truncate(new_bs, desc_len); if (ret < 0) { - error_setg(errp, "Could not truncate file"); + error_setg_errno(errp, -ret, "Could not truncate file"); } } exit: -- cgit v1.2.3