| Message ID | 20200717161212.10731-9-bstroesser@ts.fujitsu.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | scsi: target: tcmu: Add TMR notification for tcmu | expand |
On 7/17/20 11:12 AM, Bodo Stroesser wrote: > Add "tmr_notification" configFS attribute to tcmu devices. > If default value 0 of the attribute is used, tcmu only > removes aborted commands from qfull_queue. > If user changes tmr_notification to 1, additionally > TMR notifications will be written to the cmd ring. > > Signed-off-by: Bodo Stroesser <bstroesser@ts.fujitsu.com> > --- > drivers/target/target_core_user.c | 39 +++++++++++++++++++++++++++++++++++++++ > 1 file changed, 39 insertions(+) > > diff --git a/drivers/target/target_core_user.c b/drivers/target/target_core_user.c > index 92b7a2e84e64..95e66b707373 100644 > --- a/drivers/target/target_core_user.c > +++ b/drivers/target/target_core_user.c > @@ -118,6 +118,7 @@ struct tcmu_dev { > #define TCMU_DEV_BIT_OPEN 0 > #define TCMU_DEV_BIT_BROKEN 1 > #define TCMU_DEV_BIT_BLOCKED 2 > +#define TCMU_DEV_BIT_TMR_NOTIFY 3 > unsigned long flags; > > struct uio_info uio_info; > @@ -1260,6 +1261,9 @@ tcmu_tmr_notify(struct se_device *se_dev, enum tcm_tmreq_table tmf, > if (unqueued) > tcmu_set_next_deadline(&dev->qfull_queue, &dev->qfull_timer); > > + if (!test_bit(TCMU_DEV_BIT_TMR_NOTIFY, &dev->flags)) > + goto unlock; > + > pr_debug("TMR event %d on dev %s, aborted cmds %d, afflicted cmd_ids %d\n", > tcmu_tmr_type(tmf), dev->name, i, cmd_cnt); > > @@ -2706,6 +2710,40 @@ static ssize_t tcmu_emulate_write_cache_store(struct config_item *item, > } > CONFIGFS_ATTR(tcmu_, emulate_write_cache); > > +static ssize_t tcmu_tmr_notification_show(struct config_item *item, > + char *page) Sorry about this. Just some nits. The spacing above got messed up a little. I think you only need 2 spaces, but it looks like we got some extras. > +{ > + struct se_dev_attrib *da = container_of(to_config_group(item), > + struct se_dev_attrib, da_group); > + struct tcmu_dev *dev = TCMU_DEV(da->da_dev); Could you use udev or tcmu_dev for the name. Sorry for being a broken record on this one. We use dev or se_dev for the se_device struct already and it throws me off when scanning the code. I think patch 5 and 7 need the same fix up.
On 2020-07-26 02:06, Mike Christie wrote: > On 7/17/20 11:12 AM, Bodo Stroesser wrote: >> Add "tmr_notification" configFS attribute to tcmu devices. >> If default value 0 of the attribute is used, tcmu only >> removes aborted commands from qfull_queue. >> If user changes tmr_notification to 1, additionally >> TMR notifications will be written to the cmd ring. >> >> Signed-off-by: Bodo Stroesser <bstroesser@ts.fujitsu.com> >> --- >> drivers/target/target_core_user.c | 39 +++++++++++++++++++++++++++++++++++++++ >> 1 file changed, 39 insertions(+) >> >> diff --git a/drivers/target/target_core_user.c b/drivers/target/target_core_user.c >> index 92b7a2e84e64..95e66b707373 100644 >> --- a/drivers/target/target_core_user.c >> +++ b/drivers/target/target_core_user.c >> @@ -118,6 +118,7 @@ struct tcmu_dev { >> #define TCMU_DEV_BIT_OPEN 0 >> #define TCMU_DEV_BIT_BROKEN 1 >> #define TCMU_DEV_BIT_BLOCKED 2 >> +#define TCMU_DEV_BIT_TMR_NOTIFY 3 >> unsigned long flags; >> >> struct uio_info uio_info; >> @@ -1260,6 +1261,9 @@ tcmu_tmr_notify(struct se_device *se_dev, enum tcm_tmreq_table tmf, >> if (unqueued) >> tcmu_set_next_deadline(&dev->qfull_queue, &dev->qfull_timer); >> >> + if (!test_bit(TCMU_DEV_BIT_TMR_NOTIFY, &dev->flags)) >> + goto unlock; >> + >> pr_debug("TMR event %d on dev %s, aborted cmds %d, afflicted cmd_ids %d\n", >> tcmu_tmr_type(tmf), dev->name, i, cmd_cnt); >> >> @@ -2706,6 +2710,40 @@ static ssize_t tcmu_emulate_write_cache_store(struct config_item *item, >> } >> CONFIGFS_ATTR(tcmu_, emulate_write_cache); >> >> +static ssize_t tcmu_tmr_notification_show(struct config_item *item, >> + char *page) > > Sorry about this. Just some nits. > > The spacing above got messed up a little. I think you only need 2 spaces, but it looks like we got some extras. I'll fix. > > >> +{ >> + struct se_dev_attrib *da = container_of(to_config_group(item), >> + struct se_dev_attrib, da_group); >> + struct tcmu_dev *dev = TCMU_DEV(da->da_dev); > > > Could you use udev or tcmu_dev for the name. Sorry for being a broken record on this one. We use dev or se_dev for the se_device struct already and it throws me off when scanning the code. > > I think patch 5 and 7 need the same fix up. > I think I missunderstood your previous writing. I intentionally used dev and not udev because I thought you wanted it ... No problem. I'll fix.
diff --git a/drivers/target/target_core_user.c b/drivers/target/target_core_user.c index 92b7a2e84e64..95e66b707373 100644 --- a/drivers/target/target_core_user.c +++ b/drivers/target/target_core_user.c @@ -118,6 +118,7 @@ struct tcmu_dev { #define TCMU_DEV_BIT_OPEN 0 #define TCMU_DEV_BIT_BROKEN 1 #define TCMU_DEV_BIT_BLOCKED 2 +#define TCMU_DEV_BIT_TMR_NOTIFY 3 unsigned long flags; struct uio_info uio_info; @@ -1260,6 +1261,9 @@ tcmu_tmr_notify(struct se_device *se_dev, enum tcm_tmreq_table tmf, if (unqueued) tcmu_set_next_deadline(&dev->qfull_queue, &dev->qfull_timer); + if (!test_bit(TCMU_DEV_BIT_TMR_NOTIFY, &dev->flags)) + goto unlock; + pr_debug("TMR event %d on dev %s, aborted cmds %d, afflicted cmd_ids %d\n", tcmu_tmr_type(tmf), dev->name, i, cmd_cnt); @@ -2706,6 +2710,40 @@ static ssize_t tcmu_emulate_write_cache_store(struct config_item *item, } CONFIGFS_ATTR(tcmu_, emulate_write_cache); +static ssize_t tcmu_tmr_notification_show(struct config_item *item, + char *page) +{ + struct se_dev_attrib *da = container_of(to_config_group(item), + struct se_dev_attrib, da_group); + struct tcmu_dev *dev = TCMU_DEV(da->da_dev); + + return snprintf(page, PAGE_SIZE, "%i\n", + test_bit(TCMU_DEV_BIT_TMR_NOTIFY, &dev->flags)); +} + +static ssize_t tcmu_tmr_notification_store(struct config_item *item, + const char *page, size_t count) +{ + struct se_dev_attrib *da = container_of(to_config_group(item), + struct se_dev_attrib, da_group); + struct tcmu_dev *dev = TCMU_DEV(da->da_dev); + u8 val; + int ret; + + ret = kstrtou8(page, 0, &val); + if (ret < 0) + return ret; + if (val > 1) + return -EINVAL; + + if (val) + set_bit(TCMU_DEV_BIT_TMR_NOTIFY, &dev->flags); + else + clear_bit(TCMU_DEV_BIT_TMR_NOTIFY, &dev->flags); + return count; +} +CONFIGFS_ATTR(tcmu_, tmr_notification); + static ssize_t tcmu_block_dev_show(struct config_item *item, char *page) { struct se_device *se_dev = container_of(to_config_group(item), @@ -2787,6 +2825,7 @@ static struct configfs_attribute *tcmu_attrib_attrs[] = { &tcmu_attr_dev_config, &tcmu_attr_dev_size, &tcmu_attr_emulate_write_cache, + &tcmu_attr_tmr_notification, &tcmu_attr_nl_reply_supported, NULL, };
Add "tmr_notification" configFS attribute to tcmu devices. If default value 0 of the attribute is used, tcmu only removes aborted commands from qfull_queue. If user changes tmr_notification to 1, additionally TMR notifications will be written to the cmd ring. Signed-off-by: Bodo Stroesser <bstroesser@ts.fujitsu.com> --- drivers/target/target_core_user.c | 39 +++++++++++++++++++++++++++++++++++++++ 1 file changed, 39 insertions(+)