dm table: pass correct dev area size to device_area_is_valid

Incorrect device area lengths are being passed to device_area_is_valid().

The regression appeared in 2.6.31-rc1 through commit
754c5fc7ebb417b23601a6222a6005cc2e7f2913.

With the dm-stripe target, the size of the target (ti->len) was used
instead of the stripe_width (ti->len/#stripes).  An example of a
consequent incorrect error message is:

  device-mapper: table: 254:0: sdb too small for target

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

8 files changed, 17 insertions, 16 deletions

diff --git a/drivers/md/dm-crypt.c b/drivers/md/dm-crypt.c
index 529e2ba505c3..ed1038164019 100644
--- a/drivers/md/dm-crypt.c
+++ b/drivers/md/dm-crypt.c
@@ -1318,7 +1318,7 @@ static int crypt_iterate_devices(struct dm_target *ti,
 {
         struct crypt_config *cc = ti->private;
 
-        return fn(ti, cc->dev, cc->start, data);
+        return fn(ti, cc->dev, cc->start, ti->len, data);
 }
 
 static struct target_type crypt_target = {
diff --git a/drivers/md/dm-delay.c b/drivers/md/dm-delay.c
index 4e5b843cd4d7..ebe7381f47c8 100644
--- a/drivers/md/dm-delay.c
+++ b/drivers/md/dm-delay.c
@@ -324,12 +324,12 @@ static int delay_iterate_devices(struct dm_target *ti,
         struct delay_c *dc = ti->private;
         int ret = 0;
 
-        ret = fn(ti, dc->dev_read, dc->start_read, data);
+        ret = fn(ti, dc->dev_read, dc->start_read, ti->len, data);
         if (ret)
                 goto out;
 
         if (dc->dev_write)
-                ret = fn(ti, dc->dev_write, dc->start_write, data);
+                ret = fn(ti, dc->dev_write, dc->start_write, ti->len, data);
 
 out:
         return ret;
diff --git a/drivers/md/dm-linear.c b/drivers/md/dm-linear.c
index 9184b6deb868..82f7d6e6b1ea 100644
--- a/drivers/md/dm-linear.c
+++ b/drivers/md/dm-linear.c
@@ -139,7 +139,7 @@ static int linear_iterate_devices(struct dm_target *ti,
 {
         struct linear_c *lc = ti->private;
 
-        return fn(ti, lc->dev, lc->start, data);
+        return fn(ti, lc->dev, lc->start, ti->len, data);
 }
 
 static struct target_type linear_target = {
diff --git a/drivers/md/dm-mpath.c b/drivers/md/dm-mpath.c
index c70604a20897..6f0d90d4a541 100644
--- a/drivers/md/dm-mpath.c
+++ b/drivers/md/dm-mpath.c
@@ -1453,7 +1453,7 @@ static int multipath_iterate_devices(struct dm_target *ti,
 
         list_for_each_entry(pg, &m->priority_groups, list) {
                 list_for_each_entry(p, &pg->pgpaths, list) {
-                        ret = fn(ti, p->path.dev, ti->begin, data);
+                        ret = fn(ti, p->path.dev, ti->begin, ti->len, data);
                         if (ret)
                                 goto out;
                 }
diff --git a/drivers/md/dm-raid1.c b/drivers/md/dm-raid1.c
index 42a3e4341d60..9726577cde49 100644
--- a/drivers/md/dm-raid1.c
+++ b/drivers/md/dm-raid1.c
@@ -1293,7 +1293,7 @@ static int mirror_iterate_devices(struct dm_target *ti,
 
         for (i = 0; !ret && i < ms->nr_mirrors; i++)
                 ret = fn(ti, ms->mirror[i].dev,
-                         ms->mirror[i].offset, data);
+                         ms->mirror[i].offset, ti->len, data);
 
         return ret;
 }
diff --git a/drivers/md/dm-stripe.c b/drivers/md/dm-stripe.c
index b240e85ae39a..4e0e5937e42a 100644
--- a/drivers/md/dm-stripe.c
+++ b/drivers/md/dm-stripe.c
@@ -320,10 +320,11 @@ static int stripe_iterate_devices(struct dm_target *ti,
         int ret = 0;
         unsigned i = 0;
 
-        do
+        do {
                 ret = fn(ti, sc->stripe[i].dev,
-                         sc->stripe[i].physical_start, data);
-        while (!ret && ++i < sc->stripes);
+                         sc->stripe[i].physical_start,
+                         sc->stripe_width, data);
+        } while (!ret && ++i < sc->stripes);
 
         return ret;
 }
diff --git a/drivers/md/dm-table.c b/drivers/md/dm-table.c
index 5d16d06613aa..d952b3441913 100644
--- a/drivers/md/dm-table.c
+++ b/drivers/md/dm-table.c
@@ -346,7 +346,7 @@ static void close_dev(struct dm_dev_internal *d, struct mapped_device *md)
  * If possible, this checks an area of a destination device is valid.
  */
 static int device_area_is_valid(struct dm_target *ti, struct dm_dev *dev,
-                                sector_t start, void *data)
+                                sector_t start, sector_t len, void *data)
 {
         struct queue_limits *limits = data;
         struct block_device *bdev = dev->bdev;
@@ -359,7 +359,7 @@ static int device_area_is_valid(struct dm_target *ti, struct dm_dev *dev,
         if (!dev_size)
                 return 1;
 
-        if ((start >= dev_size) || (start + ti->len > dev_size)) {
+        if ((start >= dev_size) || (start + len > dev_size)) {
                 DMWARN("%s: %s too small for target",
                        dm_device_name(ti->table->md), bdevname(bdev, b));
                 return 0;
@@ -377,11 +377,11 @@ static int device_area_is_valid(struct dm_target *ti, struct dm_dev *dev,
                 return 0;
         }
 
-        if (ti->len & (logical_block_size_sectors - 1)) {
+        if (len & (logical_block_size_sectors - 1)) {
                 DMWARN("%s: len=%llu not aligned to h/w "
                        "logical block size %hu of %s",
                        dm_device_name(ti->table->md),
-                       (unsigned long long)ti->len,
+                       (unsigned long long)len,
                        limits->logical_block_size, bdevname(bdev, b));
                 return 0;
         }
@@ -482,7 +482,7 @@ static int __table_get_device(struct dm_table *t, struct dm_target *ti,
 #define min_not_zero(l, r) (l == 0) ? r : ((r == 0) ? l : min(l, r))
 
 int dm_set_device_limits(struct dm_target *ti, struct dm_dev *dev,
-                         sector_t start, void *data)
+                         sector_t start, sector_t len, void *data)
 {
         struct queue_limits *limits = data;
         struct block_device *bdev = dev->bdev;
diff --git a/include/linux/device-mapper.h b/include/linux/device-mapper.h
index 0d6310657f32..655e7721580a 100644
--- a/include/linux/device-mapper.h
+++ b/include/linux/device-mapper.h
@@ -84,7 +84,7 @@ typedef int (*dm_merge_fn) (struct dm_target *ti, struct bvec_merge_data *bvm,
 
 typedef int (*iterate_devices_callout_fn) (struct dm_target *ti,
                                            struct dm_dev *dev,
-                                           sector_t physical_start,
+                                           sector_t start, sector_t len,
                                            void *data);
 
 typedef int (*dm_iterate_devices_fn) (struct dm_target *ti,
@@ -104,7 +104,7 @@ void dm_error(const char *message);
  * Combine device limits.
  */
 int dm_set_device_limits(struct dm_target *ti, struct dm_dev *dev,
-                         sector_t start, void *data);
+                         sector_t start, sector_t len, void *data);
 
 struct dm_dev {
         struct block_device *bdev;