lk/linux-kernel-test
1
0
Fork 0
Code Issues Pull Requests Releases Wiki Activity

[PATCH] Add blk_rq_map_kern()

Browse Source 
Add blk_rq_map_kern which takes a kernel buffer and maps it into
a request and bio. This can be used by the dm hw_handlers, old
sg_scsi_ioctl, and one day scsi special requests so all requests
comming into scsi will have bios. All requests having bios
should allow scsi to use scatter lists for all IO and allow it
to use block layer functions.

Signed-off-by: Jens Axboe <axboe@suse.de>
This commit is contained in:
Mike Christie
2005-06-20 14:04:44 +02:00
committed by Jens Axboe
parent 8b22c249e7
commit df46b9a44c
4 changed files with 126 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files

2
include/linux/bio.h
View File

@@ -282,6 +282,8 @@ extern int bio_get_nr_vecs(struct block_device *);
extern struct bio *bio_map_user(struct request_queue *, struct block_device *,
unsigned long, unsigned int, int);
extern void bio_unmap_user(struct bio *);
extern struct bio *bio_map_kern(struct request_queue *, void *, unsigned int,
unsigned int);
extern void bio_set_pages_dirty(struct bio *bio);
extern void bio_check_pages_dirty(struct bio *bio);
extern struct bio *bio_copy_user(struct request_queue *, unsigned long, unsigned int, int);