Hi,
I wrote a basic device mapper driver which caches reads.
I gave dm msg prefix as below
#define DM_MSG_PREFIX "cacheread".
When i try to create a device mapper node using the below command
echo "0 `blockdev --getsize /dev/sda2` cacheread /dev/sda2 0" | dmsetup create cacheread
the system hangs.I am not getting any error messages.
When i try to create a device mapper node for linear target(this target is already present with the device mapper code) using below command
echo "0 `blockdev --getsize /dev/sda2` linear /dev/sda2 0" | dmsetup create linear
it succeeds and creates device node linear in /dev/mapper directory.
I am stuck with this issue and not able to proceed furthur.
Please let me know if you have any suggestions.
Any help is truely appreciated.
Thanks in advance.
Regards,
Monica
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