* misc driver updates
@ 2014-05-01 14:51 Christoph Hellwig
2014-05-01 14:51 ` [PATCH 1/2] virtio_scsi: use cmd_size Christoph Hellwig
` (2 more replies)
0 siblings, 3 replies; 6+ messages in thread
From: Christoph Hellwig @ 2014-05-01 14:51 UTC (permalink / raw)
To: James Bottomley; +Cc: linux-scsi
Two small driver updates that were a fallout from the scsi multiqueue
work. Both have been ACKed by the maintainers.
^ permalink raw reply [flat|nested] 6+ messages in thread* [PATCH 1/2] virtio_scsi: use cmd_size 2014-05-01 14:51 misc driver updates Christoph Hellwig @ 2014-05-01 14:51 ` Christoph Hellwig 2014-05-19 17:44 ` Nicholas A. Bellinger 2014-05-01 14:51 ` [PATCH 2/2] scsi_debug: simple short transfer injection Christoph Hellwig 2014-05-19 14:07 ` misc driver updates Christoph Hellwig 2 siblings, 1 reply; 6+ messages in thread From: Christoph Hellwig @ 2014-05-01 14:51 UTC (permalink / raw) To: James Bottomley; +Cc: linux-scsi Taken almost entirely from Nicholas Bellinger's scsi-mq conversion. Signed-off-by: Christoph Hellwig <hch@lst.de> Acked-by: Paolo Bonzini <pbonzini@redhat.com> --- drivers/scsi/virtio_scsi.c | 25 +++++++------------------ include/scsi/scsi_cmnd.h | 9 +++++++++ 2 files changed, 16 insertions(+), 18 deletions(-) diff --git a/drivers/scsi/virtio_scsi.c b/drivers/scsi/virtio_scsi.c index 16bfd50..5ec4a73 100644 --- a/drivers/scsi/virtio_scsi.c +++ b/drivers/scsi/virtio_scsi.c @@ -204,7 +204,6 @@ static void virtscsi_complete_cmd(struct virtio_scsi *vscsi, void *buf) set_driver_byte(sc, DRIVER_SENSE); } - mempool_free(cmd, virtscsi_cmd_pool); sc->scsi_done(sc); atomic_dec(&tgt->reqs); @@ -279,8 +278,6 @@ static void virtscsi_complete_free(struct virtio_scsi *vscsi, void *buf) if (cmd->comp) complete_all(cmd->comp); - else - mempool_free(cmd, virtscsi_cmd_pool); } static void virtscsi_ctrl_done(struct virtqueue *vq) @@ -496,10 +493,9 @@ static int virtscsi_queuecommand(struct virtio_scsi *vscsi, struct virtio_scsi_vq *req_vq, struct scsi_cmnd *sc) { - struct virtio_scsi_cmd *cmd; - int ret; - struct Scsi_Host *shost = virtio_scsi_host(vscsi->vdev); + struct virtio_scsi_cmd *cmd = scsi_cmd_priv(sc); + BUG_ON(scsi_sg_count(sc) > shost->sg_tablesize); /* TODO: check feature bit and fail if unsupported? */ @@ -508,11 +504,6 @@ static int virtscsi_queuecommand(struct virtio_scsi *vscsi, dev_dbg(&sc->device->sdev_gendev, "cmd %p CDB: %#02x\n", sc, sc->cmnd[0]); - ret = SCSI_MLQUEUE_HOST_BUSY; - cmd = mempool_alloc(virtscsi_cmd_pool, GFP_ATOMIC); - if (!cmd) - goto out; - memset(cmd, 0, sizeof(*cmd)); cmd->sc = sc; cmd->req.cmd = (struct virtio_scsi_cmd_req){ @@ -531,13 +522,9 @@ static int virtscsi_queuecommand(struct virtio_scsi *vscsi, if (virtscsi_kick_cmd(req_vq, cmd, sizeof cmd->req.cmd, sizeof cmd->resp.cmd, - GFP_ATOMIC) == 0) - ret = 0; - else - mempool_free(cmd, virtscsi_cmd_pool); - -out: - return ret; + GFP_ATOMIC) != 0) + return SCSI_MLQUEUE_HOST_BUSY; + return 0; } static int virtscsi_queuecommand_single(struct Scsi_Host *sh, @@ -683,6 +670,7 @@ static struct scsi_host_template virtscsi_host_template_single = { .name = "Virtio SCSI HBA", .proc_name = "virtio_scsi", .this_id = -1, + .cmd_size = sizeof(struct virtio_scsi_cmd), .queuecommand = virtscsi_queuecommand_single, .eh_abort_handler = virtscsi_abort, .eh_device_reset_handler = virtscsi_device_reset, @@ -699,6 +687,7 @@ static struct scsi_host_template virtscsi_host_template_multi = { .name = "Virtio SCSI HBA", .proc_name = "virtio_scsi", .this_id = -1, + .cmd_size = sizeof(struct virtio_scsi_cmd), .queuecommand = virtscsi_queuecommand_multi, .eh_abort_handler = virtscsi_abort, .eh_device_reset_handler = virtscsi_device_reset, diff --git a/include/scsi/scsi_cmnd.h b/include/scsi/scsi_cmnd.h index dd7c998..e016e2a 100644 --- a/include/scsi/scsi_cmnd.h +++ b/include/scsi/scsi_cmnd.h @@ -133,6 +133,15 @@ struct scsi_cmnd { unsigned char tag; /* SCSI-II queued command tag */ }; +/* + * Return the driver private allocation behind the command. + * Only works if cmd_size is set in the host template. + */ +static inline void *scsi_cmd_priv(struct scsi_cmnd *cmd) +{ + return cmd + 1; +} + /* make sure not to use it with REQ_TYPE_BLOCK_PC commands */ static inline struct scsi_driver *scsi_cmd_to_driver(struct scsi_cmnd *cmd) { -- 1.7.10.4 ^ permalink raw reply related [flat|nested] 6+ messages in thread
* Re: [PATCH 1/2] virtio_scsi: use cmd_size 2014-05-01 14:51 ` [PATCH 1/2] virtio_scsi: use cmd_size Christoph Hellwig @ 2014-05-19 17:44 ` Nicholas A. Bellinger 0 siblings, 0 replies; 6+ messages in thread From: Nicholas A. Bellinger @ 2014-05-19 17:44 UTC (permalink / raw) To: Christoph Hellwig; +Cc: James Bottomley, linux-scsi On Thu, 2014-05-01 at 16:51 +0200, Christoph Hellwig wrote: > Taken almost entirely from Nicholas Bellinger's scsi-mq conversion. > > Signed-off-by: Christoph Hellwig <hch@lst.de> > Acked-by: Paolo Bonzini <pbonzini@redhat.com> > --- Reviewed-by: Nicholas Bellinger <nab@linux-iscsi.org> > drivers/scsi/virtio_scsi.c | 25 +++++++------------------ > include/scsi/scsi_cmnd.h | 9 +++++++++ > 2 files changed, 16 insertions(+), 18 deletions(-) > > diff --git a/drivers/scsi/virtio_scsi.c b/drivers/scsi/virtio_scsi.c > index 16bfd50..5ec4a73 100644 > --- a/drivers/scsi/virtio_scsi.c > +++ b/drivers/scsi/virtio_scsi.c > @@ -204,7 +204,6 @@ static void virtscsi_complete_cmd(struct virtio_scsi *vscsi, void *buf) > set_driver_byte(sc, DRIVER_SENSE); > } > > - mempool_free(cmd, virtscsi_cmd_pool); > sc->scsi_done(sc); > > atomic_dec(&tgt->reqs); > @@ -279,8 +278,6 @@ static void virtscsi_complete_free(struct virtio_scsi *vscsi, void *buf) > > if (cmd->comp) > complete_all(cmd->comp); > - else > - mempool_free(cmd, virtscsi_cmd_pool); > } > > static void virtscsi_ctrl_done(struct virtqueue *vq) > @@ -496,10 +493,9 @@ static int virtscsi_queuecommand(struct virtio_scsi *vscsi, > struct virtio_scsi_vq *req_vq, > struct scsi_cmnd *sc) > { > - struct virtio_scsi_cmd *cmd; > - int ret; > - > struct Scsi_Host *shost = virtio_scsi_host(vscsi->vdev); > + struct virtio_scsi_cmd *cmd = scsi_cmd_priv(sc); > + > BUG_ON(scsi_sg_count(sc) > shost->sg_tablesize); > > /* TODO: check feature bit and fail if unsupported? */ > @@ -508,11 +504,6 @@ static int virtscsi_queuecommand(struct virtio_scsi *vscsi, > dev_dbg(&sc->device->sdev_gendev, > "cmd %p CDB: %#02x\n", sc, sc->cmnd[0]); > > - ret = SCSI_MLQUEUE_HOST_BUSY; > - cmd = mempool_alloc(virtscsi_cmd_pool, GFP_ATOMIC); > - if (!cmd) > - goto out; > - > memset(cmd, 0, sizeof(*cmd)); > cmd->sc = sc; > cmd->req.cmd = (struct virtio_scsi_cmd_req){ > @@ -531,13 +522,9 @@ static int virtscsi_queuecommand(struct virtio_scsi *vscsi, > > if (virtscsi_kick_cmd(req_vq, cmd, > sizeof cmd->req.cmd, sizeof cmd->resp.cmd, > - GFP_ATOMIC) == 0) > - ret = 0; > - else > - mempool_free(cmd, virtscsi_cmd_pool); > - > -out: > - return ret; > + GFP_ATOMIC) != 0) > + return SCSI_MLQUEUE_HOST_BUSY; > + return 0; > } > > static int virtscsi_queuecommand_single(struct Scsi_Host *sh, > @@ -683,6 +670,7 @@ static struct scsi_host_template virtscsi_host_template_single = { > .name = "Virtio SCSI HBA", > .proc_name = "virtio_scsi", > .this_id = -1, > + .cmd_size = sizeof(struct virtio_scsi_cmd), > .queuecommand = virtscsi_queuecommand_single, > .eh_abort_handler = virtscsi_abort, > .eh_device_reset_handler = virtscsi_device_reset, > @@ -699,6 +687,7 @@ static struct scsi_host_template virtscsi_host_template_multi = { > .name = "Virtio SCSI HBA", > .proc_name = "virtio_scsi", > .this_id = -1, > + .cmd_size = sizeof(struct virtio_scsi_cmd), > .queuecommand = virtscsi_queuecommand_multi, > .eh_abort_handler = virtscsi_abort, > .eh_device_reset_handler = virtscsi_device_reset, > diff --git a/include/scsi/scsi_cmnd.h b/include/scsi/scsi_cmnd.h > index dd7c998..e016e2a 100644 > --- a/include/scsi/scsi_cmnd.h > +++ b/include/scsi/scsi_cmnd.h > @@ -133,6 +133,15 @@ struct scsi_cmnd { > unsigned char tag; /* SCSI-II queued command tag */ > }; > > +/* > + * Return the driver private allocation behind the command. > + * Only works if cmd_size is set in the host template. > + */ > +static inline void *scsi_cmd_priv(struct scsi_cmnd *cmd) > +{ > + return cmd + 1; > +} > + > /* make sure not to use it with REQ_TYPE_BLOCK_PC commands */ > static inline struct scsi_driver *scsi_cmd_to_driver(struct scsi_cmnd *cmd) > { ^ permalink raw reply [flat|nested] 6+ messages in thread
* [PATCH 2/2] scsi_debug: simple short transfer injection 2014-05-01 14:51 misc driver updates Christoph Hellwig 2014-05-01 14:51 ` [PATCH 1/2] virtio_scsi: use cmd_size Christoph Hellwig @ 2014-05-01 14:51 ` Christoph Hellwig 2014-05-19 17:45 ` Nicholas A. Bellinger 2014-05-19 14:07 ` misc driver updates Christoph Hellwig 2 siblings, 1 reply; 6+ messages in thread From: Christoph Hellwig @ 2014-05-01 14:51 UTC (permalink / raw) To: James Bottomley; +Cc: linux-scsi Add an option to only transfer half the data for every n-th command. Signed-off-by: Christoph Hellwig <hch@lst.de> Acked-by: Douglas Gilbert <dgilbert@interlog.com> --- drivers/scsi/scsi_debug.c | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/drivers/scsi/scsi_debug.c b/drivers/scsi/scsi_debug.c index f3e9cc0..1328a26 100644 --- a/drivers/scsi/scsi_debug.c +++ b/drivers/scsi/scsi_debug.c @@ -130,6 +130,7 @@ static const char * scsi_debug_version_date = "20100324"; #define SCSI_DEBUG_OPT_DIF_ERR 32 #define SCSI_DEBUG_OPT_DIX_ERR 64 #define SCSI_DEBUG_OPT_MAC_TIMEOUT 128 +#define SCSI_DEBUG_OPT_SHORT_TRANSFER 256 /* When "every_nth" > 0 then modulo "every_nth" commands: * - a no response is simulated if SCSI_DEBUG_OPT_TIMEOUT is set * - a RECOVERED_ERROR is simulated on successful read and write @@ -3583,6 +3584,7 @@ int scsi_debug_queuecommand_lck(struct scsi_cmnd *SCpnt, done_funct_t done) int inj_transport = 0; int inj_dif = 0; int inj_dix = 0; + int inj_short = 0; int delay_override = 0; int unmap = 0; @@ -3628,6 +3630,8 @@ int scsi_debug_queuecommand_lck(struct scsi_cmnd *SCpnt, done_funct_t done) inj_dif = 1; /* to reads and writes below */ else if (SCSI_DEBUG_OPT_DIX_ERR & scsi_debug_opts) inj_dix = 1; /* to reads and writes below */ + else if (SCSI_DEBUG_OPT_SHORT_TRANSFER & scsi_debug_opts) + inj_short = 1; } if (devip->wlun) { @@ -3744,6 +3748,10 @@ read: if (scsi_debug_fake_rw) break; get_data_transfer_info(cmd, &lba, &num, &ei_lba); + + if (inj_short) + num /= 2; + errsts = resp_read(SCpnt, lba, num, devip, ei_lba); if (inj_recovered && (0 == errsts)) { mk_sense_buffer(devip, RECOVERED_ERROR, -- 1.7.10.4 ^ permalink raw reply related [flat|nested] 6+ messages in thread
* Re: [PATCH 2/2] scsi_debug: simple short transfer injection 2014-05-01 14:51 ` [PATCH 2/2] scsi_debug: simple short transfer injection Christoph Hellwig @ 2014-05-19 17:45 ` Nicholas A. Bellinger 0 siblings, 0 replies; 6+ messages in thread From: Nicholas A. Bellinger @ 2014-05-19 17:45 UTC (permalink / raw) To: Christoph Hellwig; +Cc: James Bottomley, linux-scsi On Thu, 2014-05-01 at 16:51 +0200, Christoph Hellwig wrote: > Add an option to only transfer half the data for every n-th command. > > Signed-off-by: Christoph Hellwig <hch@lst.de> > Acked-by: Douglas Gilbert <dgilbert@interlog.com> Reviewed-by: Nicholas Bellinger <nab@linux-iscsi.org> > --- > drivers/scsi/scsi_debug.c | 8 ++++++++ > 1 file changed, 8 insertions(+) > > diff --git a/drivers/scsi/scsi_debug.c b/drivers/scsi/scsi_debug.c > index f3e9cc0..1328a26 100644 > --- a/drivers/scsi/scsi_debug.c > +++ b/drivers/scsi/scsi_debug.c > @@ -130,6 +130,7 @@ static const char * scsi_debug_version_date = "20100324"; > #define SCSI_DEBUG_OPT_DIF_ERR 32 > #define SCSI_DEBUG_OPT_DIX_ERR 64 > #define SCSI_DEBUG_OPT_MAC_TIMEOUT 128 > +#define SCSI_DEBUG_OPT_SHORT_TRANSFER 256 > /* When "every_nth" > 0 then modulo "every_nth" commands: > * - a no response is simulated if SCSI_DEBUG_OPT_TIMEOUT is set > * - a RECOVERED_ERROR is simulated on successful read and write > @@ -3583,6 +3584,7 @@ int scsi_debug_queuecommand_lck(struct scsi_cmnd *SCpnt, done_funct_t done) > int inj_transport = 0; > int inj_dif = 0; > int inj_dix = 0; > + int inj_short = 0; > int delay_override = 0; > int unmap = 0; > > @@ -3628,6 +3630,8 @@ int scsi_debug_queuecommand_lck(struct scsi_cmnd *SCpnt, done_funct_t done) > inj_dif = 1; /* to reads and writes below */ > else if (SCSI_DEBUG_OPT_DIX_ERR & scsi_debug_opts) > inj_dix = 1; /* to reads and writes below */ > + else if (SCSI_DEBUG_OPT_SHORT_TRANSFER & scsi_debug_opts) > + inj_short = 1; > } > > if (devip->wlun) { > @@ -3744,6 +3748,10 @@ read: > if (scsi_debug_fake_rw) > break; > get_data_transfer_info(cmd, &lba, &num, &ei_lba); > + > + if (inj_short) > + num /= 2; > + > errsts = resp_read(SCpnt, lba, num, devip, ei_lba); > if (inj_recovered && (0 == errsts)) { > mk_sense_buffer(devip, RECOVERED_ERROR, ^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: misc driver updates 2014-05-01 14:51 misc driver updates Christoph Hellwig 2014-05-01 14:51 ` [PATCH 1/2] virtio_scsi: use cmd_size Christoph Hellwig 2014-05-01 14:51 ` [PATCH 2/2] scsi_debug: simple short transfer injection Christoph Hellwig @ 2014-05-19 14:07 ` Christoph Hellwig 2 siblings, 0 replies; 6+ messages in thread From: Christoph Hellwig @ 2014-05-19 14:07 UTC (permalink / raw) To: Christoph Hellwig; +Cc: linux-scsi I'm still looking for one more review for each of the patches. ^ permalink raw reply [flat|nested] 6+ messages in thread
end of thread, other threads:[~2014-05-19 17:45 UTC | newest] Thread overview: 6+ messages (download: mbox.gz / follow: Atom feed) -- links below jump to the message on this page -- 2014-05-01 14:51 misc driver updates Christoph Hellwig 2014-05-01 14:51 ` [PATCH 1/2] virtio_scsi: use cmd_size Christoph Hellwig 2014-05-19 17:44 ` Nicholas A. Bellinger 2014-05-01 14:51 ` [PATCH 2/2] scsi_debug: simple short transfer injection Christoph Hellwig 2014-05-19 17:45 ` Nicholas A. Bellinger 2014-05-19 14:07 ` misc driver updates Christoph Hellwig
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