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authorMike Christie <michaelc@cs.wisc.edu>2007-03-03 09:55:54 +0900
committerJames Bottomley <jejb@mulgrave.il.steeleye.com>2007-03-11 11:31:33 -0500
commit181011e04a2a32f8d5df212254239ac9a3c8ab5e (patch)
treef633a66a5cc7c9d9cb5399107cbe7147fbd47d2a /include/scsi
parent0f238418b6d41cdfc85f2f399848429ff6fbfbd0 (diff)
downloadlinux-181011e04a2a32f8d5df212254239ac9a3c8ab5e.tar.bz2
[SCSI] tgt: rm bio hacks in scsi tgt
scsi tgt breaks up a command into multple scatterlists if we cannot fit all the data in one. This was because the block rq helpers did not support large requests and because we can get a command of any old size so it is hard to preallocate pages for scatterlist large enough (we cannot really preallocate pages with the bio map user path). In 2.6.20, we added large request support to the block layer helper, blk_rq_map_user. And at LSF, we talked about increasing SCSI_MAX_PHYS_SEGMENTS for scsi tgt if we want to support really really :) large (greater than 256 * PAGE_SIZE in the worst mapping case) requests. The only target currently implemented does not even support the multiple scatterlists stuff and only supports smaller requests, so this patch just coverts scsi tgt to use blk_rq_map_user. Signed-off-by: Mike Christie <michaelc@cs.wisc.edu> Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp> Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
Diffstat (limited to 'include/scsi')
-rw-r--r--include/scsi/scsi_cmnd.h3
1 files changed, 0 insertions, 3 deletions
diff --git a/include/scsi/scsi_cmnd.h b/include/scsi/scsi_cmnd.h
index d6948d0e8cdb..a2e0c1032491 100644
--- a/include/scsi/scsi_cmnd.h
+++ b/include/scsi/scsi_cmnd.h
@@ -73,9 +73,6 @@ struct scsi_cmnd {
unsigned short use_sg; /* Number of pieces of scatter-gather */
unsigned short sglist_len; /* size of malloc'd scatter-gather list */
- /* offset in cmd we are at (for multi-transfer tgt cmds) */
- unsigned offset;
-
unsigned underflow; /* Return error if less than
this amount is transferred */