dm table: add more context to terse warning messages

A couple of recent warning messages make it difficult for the reader to
determine exactly what is wrong.  This patch adds more information to
those messages.

The messages were added by these commits:
  5dea271b6d87bd1d79a59c1d5baac2596a841c37 ("dm table: pass correct dev area size
to device_area_is_valid")
  ea9df47cc92573b159ef3b4fda516c32cba9c4fd ("dm table: fix blk_stack_limits arg
to use bytes not sectors")

The patch also corrects references to logical_block_size in printk format
strings from %hu to %u.

Signed-off-by: Mike Snitzer <snitzer@redhat.com>
Signed-off-by: Alasdair G Kergon <agk@redhat.com>

1 files changed, 18 insertions, 7 deletions

diff --git a/drivers/md/dm-table.c b/drivers/md/dm-table.c
index aa60526075d7..c90e662d2802 100644
--- a/drivers/md/dm-table.c
+++ b/drivers/md/dm-table.c
@@ -360,8 +360,12 @@ static int device_area_is_invalid(struct dm_target *ti, struct dm_dev *dev,
                 return 0;
 
         if ((start >= dev_size) || (start + len > dev_size)) {
-                DMWARN("%s: %s too small for target",
-                       dm_device_name(ti->table->md), bdevname(bdev, b));
+                DMWARN("%s: %s too small for target: "
+                       "start=%llu, len=%llu, dev_size=%llu",
+                       dm_device_name(ti->table->md), bdevname(bdev, b),
+                       (unsigned long long)start,
+                       (unsigned long long)len,
+                       (unsigned long long)dev_size);
                 return 1;
         }
 
@@ -370,7 +374,7 @@ static int device_area_is_invalid(struct dm_target *ti, struct dm_dev *dev,
 
         if (start & (logical_block_size_sectors - 1)) {
                 DMWARN("%s: start=%llu not aligned to h/w "
-                       "logical block size %hu of %s",
+                       "logical block size %u of %s",
                        dm_device_name(ti->table->md),
                        (unsigned long long)start,
                        limits->logical_block_size, bdevname(bdev, b));
@@ -379,7 +383,7 @@ static int device_area_is_invalid(struct dm_target *ti, struct dm_dev *dev,
 
         if (len & (logical_block_size_sectors - 1)) {
                 DMWARN("%s: len=%llu not aligned to h/w "
-                       "logical block size %hu of %s",
+                       "logical block size %u of %s",
                        dm_device_name(ti->table->md),
                        (unsigned long long)len,
                        limits->logical_block_size, bdevname(bdev, b));
@@ -496,8 +500,15 @@ int dm_set_device_limits(struct dm_target *ti, struct dm_dev *dev,
         }
 
         if (blk_stack_limits(limits, &q->limits, start << 9) < 0)
-                DMWARN("%s: target device %s is misaligned",
-                       dm_device_name(ti->table->md), bdevname(bdev, b));
+                DMWARN("%s: target device %s is misaligned: "
+                       "physical_block_size=%u, logical_block_size=%u, "
+                       "alignment_offset=%u, start=%llu",
+                       dm_device_name(ti->table->md), bdevname(bdev, b),
+                       q->limits.physical_block_size,
+                       q->limits.logical_block_size,
+                       q->limits.alignment_offset,
+                       (unsigned long long) start << 9);
+
 
         /*
          * Check if merge fn is supported.
@@ -698,7 +709,7 @@ static int validate_hardware_logical_block_alignment(struct dm_table *table,
 
         if (remaining) {
                 DMWARN("%s: table line %u (start sect %llu len %llu) "
-                       "not aligned to h/w logical block size %hu",
+                       "not aligned to h/w logical block size %u",
                        dm_device_name(table->md), i,
                        (unsigned long long) ti->begin,
                        (unsigned long long) ti->len,