diff options
| author | Mike Christie <mchristi@redhat.com> | 2017-07-10 21:53:31 +0200 |
|---|---|---|
| committer | Nicholas Bellinger <nab@linux-iscsi.org> | 2017-07-11 05:05:27 +0200 |
| commit | c17d5d5f51f72f24e0e17a4450ae5010bf6962d9 (patch) | |
| tree | b03a0c7110d5f3e0d1b36deac77abe38b886842a /drivers | |
| parent | target: Fix return sense reason in target_scsi3_emulate_pr_out (diff) | |
| download | linux-c17d5d5f51f72f24e0e17a4450ae5010bf6962d9.tar.xz linux-c17d5d5f51f72f24e0e17a4450ae5010bf6962d9.zip | |
target: export lio pgr/alua support as device attr
Older kernels could crash or hang if the user write/read some ALUA files
with pscsi and tcmu backends. This patch exports if LIO supports
executing PGR and ALUA scsi commands/checks for the se_device, so userspace
can easily test.
Signed-off-by: Mike Christie <mchristi@redhat.com>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/target/target_core_configfs.c | 24 |
1 files changed, 24 insertions, 0 deletions
diff --git a/drivers/target/target_core_configfs.c b/drivers/target/target_core_configfs.c index 9b8abd55c21c..7e87d952bb7a 100644 --- a/drivers/target/target_core_configfs.c +++ b/drivers/target/target_core_configfs.c @@ -1085,6 +1085,24 @@ static ssize_t block_size_store(struct config_item *item, return count; } +static ssize_t alua_support_show(struct config_item *item, char *page) +{ + struct se_dev_attrib *da = to_attrib(item); + u8 flags = da->da_dev->transport->transport_flags; + + return snprintf(page, PAGE_SIZE, "%d\n", + flags & TRANSPORT_FLAG_PASSTHROUGH_ALUA ? 0 : 1); +} + +static ssize_t pgr_support_show(struct config_item *item, char *page) +{ + struct se_dev_attrib *da = to_attrib(item); + u8 flags = da->da_dev->transport->transport_flags; + + return snprintf(page, PAGE_SIZE, "%d\n", + flags & TRANSPORT_FLAG_PASSTHROUGH_PGR ? 0 : 1); +} + CONFIGFS_ATTR(, emulate_model_alias); CONFIGFS_ATTR(, emulate_dpo); CONFIGFS_ATTR(, emulate_fua_write); @@ -1116,6 +1134,8 @@ CONFIGFS_ATTR(, unmap_granularity); CONFIGFS_ATTR(, unmap_granularity_alignment); CONFIGFS_ATTR(, unmap_zeroes_data); CONFIGFS_ATTR(, max_write_same_len); +CONFIGFS_ATTR_RO(, alua_support); +CONFIGFS_ATTR_RO(, pgr_support); /* * dev_attrib attributes for devices using the target core SBC/SPC @@ -1154,6 +1174,8 @@ struct configfs_attribute *sbc_attrib_attrs[] = { &attr_unmap_granularity_alignment, &attr_unmap_zeroes_data, &attr_max_write_same_len, + &attr_alua_support, + &attr_pgr_support, NULL, }; EXPORT_SYMBOL(sbc_attrib_attrs); @@ -1168,6 +1190,8 @@ struct configfs_attribute *passthrough_attrib_attrs[] = { &attr_hw_block_size, &attr_hw_max_sectors, &attr_hw_queue_depth, + &attr_alua_support, + &attr_pgr_support, NULL, }; EXPORT_SYMBOL(passthrough_attrib_attrs); |