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| author | Mikulas Patocka <mpatocka@redhat.com> | 2009-09-04 21:40:22 +0200 |
|---|---|---|
| committer | Alasdair G Kergon <agk@redhat.com> | 2009-09-04 21:40:22 +0200 |
| commit | f6a1ed10864b7540fa758bbccf3433fe17070329 (patch) | |
| tree | e0b8f1c02f0527e0870dee2977f311695856f8a5 /drivers | |
| parent | dm snapshot: implement iterate devices (diff) | |
| download | linux-f6a1ed10864b7540fa758bbccf3433fe17070329.tar.xz linux-f6a1ed10864b7540fa758bbccf3433fe17070329.zip | |
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>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/md/dm-table.c | 22 |
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: |