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Guest
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Hi,
I am working on a CDROM block device driver in linux 2.6.26. In the
request function I
call the function elv_next_request to get the next request. From the
request I use the
req->sector, req->nr_sectors, req->buffer to read the issue a read to
CDROM sectors.
Mount and directory browsing results in a request of 4 blocks of data
which works. But
when copying a file, it makes a bigger request (64, 128, 265 etc). So
for a request of
128 sectors, my request function reads all these consecutive sectors,
but in subsequent
request starting address is the previous sector + 4 and not
prev_sector + 256, I have to
read all the sector again.
Am I missing something here? Do I need to update some req structure
members to
indicate how may blocks have been read?
Thanks,
Ashu |
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