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dm: fix to_sector() for 32bit
A dm-raid array with devices larger than 4GB won't assemble on
a 32 bit host since _check_data_dev_sectors() was added in 4.16.
This is because to_sector() treats its argument as an "unsigned long"
which is 32bits (4GB) on a 32bit host. Using "unsigned long long"
is more correct.
Kernels as early as 4.2 can have other problems due to to_sector()
being used on the size of a device.
Fixes: 0cf4503174
("dm raid: add support for the MD RAID0 personality")
cc: stable@vger.kernel.org (v4.2+)
Reported-and-tested-by: Guillaume Perréal <gperreal@free.fr>
Signed-off-by: NeilBrown <neil@brown.name>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
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1 changed files with 1 additions and 1 deletions
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@ -603,7 +603,7 @@ do { \
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*/
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*/
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#define dm_target_offset(ti, sector) ((sector) - (ti)->begin)
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#define dm_target_offset(ti, sector) ((sector) - (ti)->begin)
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static inline sector_t to_sector(unsigned long n)
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static inline sector_t to_sector(unsigned long long n)
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{
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{
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return (n >> SECTOR_SHIFT);
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return (n >> SECTOR_SHIFT);
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}
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}
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