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  1. 30 1月, 2018 1 次提交
  3. 21 6月, 2017 1 次提交
    • B
      block: Make most scsi_req_init() calls implicit · ca18d6f7
      由 Bart Van Assche 提交于 
      Instead of explicitly calling scsi_req_init() after blk_get_request(),
call that function from inside blk_get_request(). Add an
.initialize_rq_fn() callback function to the block drivers that need
it. Merge the IDE .init_rq_fn() function into .initialize_rq_fn()
because it is too small to keep it as a separate function. Keep the
scsi_req_init() call in ide_prep_sense() because it follows a
blk_rq_init() call.

References: commit 82ed4db4 ("block: split scsi_request out of struct request")
Signed-off-by: NBart Van Assche <bart.vanassche@sandisk.com>
Cc: Christoph Hellwig <hch@lst.de>
Cc: Hannes Reinecke <hare@suse.com>
Cc: Omar Sandoval <osandov@fb.com>
Cc: Nicholas Bellinger <nab@linux-iscsi.org>
Signed-off-by: NJens Axboe <axboe@kernel.dk>
      ca18d6f7
  5. 09 6月, 2017 1 次提交
    • C
      block: introduce new block status code type · 2a842aca
      由 Christoph Hellwig 提交于 
      Currently we use nornal Linux errno values in the block layer, and while
we accept any error a few have overloaded magic meanings.  This patch
instead introduces a new  blk_status_t value that holds block layer specific
status codes and explicitly explains their meaning.  Helpers to convert from
and to the previous special meanings are provided for now, but I suspect
we want to get rid of them in the long run - those drivers that have a
errno input (e.g. networking) usually get errnos that don't know about
the special block layer overloads, and similarly returning them to userspace
will usually return somethings that strictly speaking isn't correct
for file system operations, but that's left as an exercise for later.

For now the set of errors is a very limited set that closely corresponds
to the previous overloaded errno values, but there is some low hanging
fruite to improve it.

blk_status_t (ab)uses the sparse __bitwise annotations to allow for sparse
typechecking, so that we can easily catch places passing the wrong values.
Signed-off-by: NChristoph Hellwig <hch@lst.de>
Signed-off-by: NJens Axboe <axboe@fb.com>
      2a842aca
  7. 21 4月, 2017 2 次提交
  9. 02 3月, 2017 1 次提交
  11. 01 2月, 2017 2 次提交
    • C
      block: fold cmd_type into the REQ_OP_ space · aebf526b
      由 Christoph Hellwig 提交于 
      Instead of keeping two levels of indirection for requests types, fold it
all into the operations.  The little caveat here is that previously
cmd_type only applied to struct request, while the request and bio op
fields were set to plain REQ_OP_READ/WRITE even for passthrough
operations.

Instead this patch adds new REQ_OP_* for SCSI passthrough and driver
private requests, althought it has to add two for each so that we
can communicate the data in/out nature of the request.
Signed-off-by: NChristoph Hellwig <hch@lst.de>
Signed-off-by: NJens Axboe <axboe@fb.com>
      aebf526b
    • C
      ide: don't abuse cmd_type · 2f5a8e80
      由 Christoph Hellwig 提交于 
      Currently the legacy ide driver defines several request types of it's own,
which is in the way of removing that field entirely.

Instead add a type field to struct ide_request and use that to distinguish
the different types of IDE-internal requests.

It's a bit of a mess, but so is the surrounding code..
Signed-off-by: NChristoph Hellwig <hch@lst.de>
Acked-by: NDavid S. Miller <davem@davemloft.net>
Signed-off-by: NJens Axboe <axboe@fb.com>
      2f5a8e80
  13. 28 1月, 2017 1 次提交
  15. 07 11月, 2015 1 次提交
  17. 06 5月, 2015 1 次提交
  19. 11 7月, 2013 1 次提交
  21. 20 3月, 2012 1 次提交
  23. 01 11月, 2011 1 次提交
  25. 31 3月, 2011 1 次提交
  27. 09 8月, 2010 1 次提交
    • J
      drivers/ide: Use memdup_user · 7d543d84
      由 Julia Lawall 提交于 
      Use memdup_user when user data is immediately copied into the
allocated region.

The semantic patch that makes this change is as follows:
(http://coccinelle.lip6.fr/)

// <smpl>
@@
expression from,to,size,flag;
position p;
identifier l1,l2;
@@

-  to = \(kmalloc@p\|kzalloc@p\)(size,flag);
+  to = memdup_user(from,size);
   if (
-      to==NULL
+      IS_ERR(to)
                 || ...) {
   <+... when != goto l1;
-  -ENOMEM
+  PTR_ERR(to)
   ...+>
   }
-  if (copy_from_user(to, from, size) != 0) {
-    <+... when != goto l2;
-    -EFAULT
-    ...+>
-  }
// </smpl>
Signed-off-by: NJulia Lawall <julia@diku.dk>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>
      7d543d84
  29. 07 4月, 2010 1 次提交
    • M
      ide: Fix IDE taskfile with cfq scheduler · 720fc22a
      由 Mikulas Patocka 提交于 
      When ide taskfile access is being used (for example with hdparm --security
commands) and cfq scheduler is selected, the scheduler crashes on BUG in
cfq_put_request.

The reason is that the cfq scheduler is tracking counts of read and write
requests separately; the ide-taskfile subsystem allocates a read request and
then flips the flag to make it a write request. The counters in cfq will
mismatch.

This patch changes ide-taskfile to allocate the READ or WRITE request as
required and don't change the flag later.
Signed-off-by: NMikulas Patocka <mpatocka@redhat.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>
      720fc22a
  31. 08 8月, 2009 4 次提交
  33. 07 6月, 2009 1 次提交
  35. 18 5月, 2009 1 次提交
  37. 11 5月, 2009 1 次提交
  39. 28 4月, 2009 1 次提交
    • T
      ide-taskfile: don't abuse rq->buffer · d868ca24
      由 Tejun Heo 提交于 
      Impact: rq->buffer usage cleanup

ide_raw_taskfile() directly uses rq->buffer to carry pointer to the
data buffer.  This complicates both block interface and ide backend
request handling.  Use blk_rq_map_kern() instead and drop special
handling for REQ_TYPE_ATA_TASKFILE from ide_map_sg().

Note that REQ_RW setting is moved upwards as blk_rq_map_kern() uses it
to initialize bio rw flag.
Signed-off-by: NTejun Heo <tj@kernel.org>
Cc: Jens Axboe <axboe@kernel.dk>
      d868ca24
  41. 19 4月, 2009 1 次提交
    • T
      ide-taskfile: don't abuse rq->buffer · eace4cb0
      由 Tejun Heo 提交于 
      Impact: rq->buffer usage cleanup

ide_raw_taskfile() directly uses rq->buffer to carry pointer to the
data buffer.  This complicates both block interface and ide backend
request handling.  Use blk_rq_map_kern() instead and drop special
handling for REQ_TYPE_ATA_TASKFILE from ide_map_sg().

Note that REQ_RW setting is moved upwards as blk_rq_map_kern() uses it
to initialize bio rw flag.
Signed-off-by: NTejun Heo <tj@kernel.org>
Cc: Jens Axboe <axboe@kernel.dk>
      eace4cb0
  43. 08 4月, 2009 5 次提交
  45. 01 4月, 2009 6 次提交
  47. 27 3月, 2009 3 次提交