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authorMikulas Patocka <mpatocka@redhat.com>2009-09-04 20:40:22 +0100
committerAlasdair G Kergon <agk@redhat.com>2009-09-04 20:40:22 +0100
commitf6a1ed10864b7540fa758bbccf3433fe17070329 (patch)
treee0b8f1c02f0527e0870dee2977f311695856f8a5
parent8811f46c1f9386fc7017150de9d52359e5b1826e (diff)
downloadlinux-stericsson-f6a1ed10864b7540fa758bbccf3433fe17070329.tar.gz
dm table: fix queue_limit checking device iterator
The logic to check for valid device areas is inverted relative to proper use with iterate_devices. The iterate_devices method calls its callback for every underlying device in the target. If any callback returns non-zero, iterate_devices exits immediately. But the callback device_area_is_valid() returns 0 on error and 1 on success. The overall effect without is that an error is issued only if every device is invalid. This patch renames device_area_is_valid to device_area_is_invalid and inverts the logic so that one invalid device is sufficient to raise an error. Signed-off-by: Mikulas Patocka <mpatocka@redhat.com> Signed-off-by: Mike Snitzer <snitzer@redhat.com> Signed-off-by: Alasdair G Kergon <agk@redhat.com>
-rw-r--r--drivers/md/dm-table.c22
1 files changed, 11 insertions, 11 deletions
diff --git a/drivers/md/dm-table.c b/drivers/md/dm-table.c
index d952b3441913..aa60526075d7 100644
--- a/drivers/md/dm-table.c
+++ b/drivers/md/dm-table.c
@@ -343,10 +343,10 @@ 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.
+ * If possible, this checks an area of a destination device is invalid.
*/
-static int device_area_is_valid(struct dm_target *ti, struct dm_dev *dev,
- sector_t start, sector_t len, void *data)
+static int device_area_is_invalid(struct dm_target *ti, struct dm_dev *dev,
+ sector_t start, sector_t len, void *data)
{
struct queue_limits *limits = data;
struct block_device *bdev = dev->bdev;
@@ -357,16 +357,16 @@ static int device_area_is_valid(struct dm_target *ti, struct dm_dev *dev,
char b[BDEVNAME_SIZE];
if (!dev_size)
- return 1;
+ 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));
- return 0;
+ return 1;
}
if (logical_block_size_sectors <= 1)
- return 1;
+ return 0;
if (start & (logical_block_size_sectors - 1)) {
DMWARN("%s: start=%llu not aligned to h/w "
@@ -374,7 +374,7 @@ static int device_area_is_valid(struct dm_target *ti, struct dm_dev *dev,
dm_device_name(ti->table->md),
(unsigned long long)start,
limits->logical_block_size, bdevname(bdev, b));
- return 0;
+ return 1;
}
if (len & (logical_block_size_sectors - 1)) {
@@ -383,10 +383,10 @@ static int device_area_is_valid(struct dm_target *ti, struct dm_dev *dev,
dm_device_name(ti->table->md),
(unsigned long long)len,
limits->logical_block_size, bdevname(bdev, b));
- return 0;
+ return 1;
}
- return 1;
+ return 0;
}
/*
@@ -1000,8 +1000,8 @@ int dm_calculate_queue_limits(struct dm_table *table,
* Check each device area is consistent with the target's
* overall queue limits.
*/
- if (!ti->type->iterate_devices(ti, device_area_is_valid,
- &ti_limits))
+ if (ti->type->iterate_devices(ti, device_area_is_invalid,
+ &ti_limits))
return -EINVAL;
combine_limits: