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  1. 19 10月, 2017 1 次提交
  3. 26 8月, 2017 2 次提交
  5. 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
  7. 13 6月, 2017 1 次提交
    • B
      scsi: Protect SCSI device state changes with a mutex · 0db6ca8a
      由 Bart Van Assche 提交于 
      Serializing SCSI device state changes avoids that two state changes can
occur concurrently, e.g. the state changes in scsi_target_block() and
__scsi_remove_device(). This serialization is essential to make patch
"Make __scsi_remove_device go straight from BLOCKED to DEL" work
reliably.

Enable this mechanism for all scsi_target_*block() callers but not for
the scsi_internal_device_unblock() calls from the mpt3sas driver because
that driver can call scsi_internal_device_unblock() from atomic context.
Signed-off-by: NBart Van Assche <bart.vanassche@sandisk.com>
Cc: Christoph Hellwig <hch@lst.de>
Cc: Hannes Reinecke <hare@suse.com>
Cc: Johannes Thumshirn <jthumshirn@suse.de>
Signed-off-by: NMartin K. Petersen <martin.petersen@oracle.com>
      0db6ca8a
  9. 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
  11. 26 4月, 2017 1 次提交
  13. 07 4月, 2017 5 次提交
  15. 06 4月, 2017 1 次提交
  17. 07 2月, 2017 1 次提交
  19. 01 2月, 2017 2 次提交
  21. 28 1月, 2017 2 次提交
  23. 28 10月, 2016 1 次提交
  25. 09 6月, 2016 1 次提交
    • W
      scsi: fix race between simultaneous decrements of ->host_failed · 72d8c36e
      由 Wei Fang 提交于 
      sas_ata_strategy_handler() adds the works of the ata error handler to
system_unbound_wq. This workqueue asynchronously runs work items, so the
ata error handler will be performed concurrently on different CPUs. In
this case, ->host_failed will be decreased simultaneously in
scsi_eh_finish_cmd() on different CPUs, and become abnormal.

It will lead to permanently inequality between ->host_failed and
->host_busy, and scsi error handler thread won't start running. IO
errors after that won't be handled.

Since all scmds must have been handled in the strategy handler, just
remove the decrement in scsi_eh_finish_cmd() and zero ->host_busy after
the strategy handler to fix this race.

Fixes: 50824d6c ("[SCSI] libsas: async ata-eh")
Cc: stable@vger.kernel.org
Signed-off-by: NWei Fang <fangwei1@huawei.com>
Reviewed-by: NJames Bottomley <jejb@linux.vnet.ibm.com>
Signed-off-by: NMartin K. Petersen <martin.petersen@oracle.com>
      72d8c36e
  27. 05 4月, 2016 1 次提交
  29. 07 11月, 2015 1 次提交
  31. 07 9月, 2015 1 次提交
  33. 29 8月, 2015 1 次提交
  35. 27 8月, 2015 1 次提交
  37. 26 8月, 2015 1 次提交
  39. 03 8月, 2015 1 次提交
  41. 31 7月, 2015 1 次提交
    • T
      scsi: fix memory leak with scsi-mq · 0c958ecc
      由 Tony Battersby 提交于 
      Fix a memory leak with scsi-mq triggered by commands with large data
transfer length.

__sg_alloc_table() sets both table->nents and table->orig_nents to the
same value.  When the scatterlist is DMA-mapped, table->nents is
overwritten with the (possibly smaller) size of the DMA-mapped
scatterlist, while table->orig_nents retains the original size of the
allocated scatterlist.  scsi_free_sgtable() should therefore check
orig_nents instead of nents, and all code that initializes sdb->table
without calling __sg_alloc_table() should set both nents and orig_nents.

Fixes: d285203c ("scsi: add support for a blk-mq based I/O path.")
Cc: <stable@vger.kernel.org> # 3.17+
Signed-off-by: NTony Battersby <tonyb@cybernetics.com>
Reviewed-by: NChristoph Hellwig <hch@lst.de>
Reviewed-by: NEwan D. Milne <emilne@redhat.com>
Signed-off-by: NJames Bottomley <JBottomley@Odin.com>
      0c958ecc
  43. 24 7月, 2015 1 次提交
  45. 01 6月, 2015 1 次提交
  47. 27 3月, 2015 1 次提交
  49. 09 1月, 2015 2 次提交
  51. 31 12月, 2014 1 次提交
  53. 25 11月, 2014 1 次提交
  55. 24 11月, 2014 2 次提交
  57. 12 11月, 2014 3 次提交