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authorDavid Disseldorp <ddiss@suse.de>2019-02-04 21:32:10 +0300
committerMartin K. Petersen <martin.petersen@oracle.com>2019-02-05 05:40:32 +0300
commitb6cd7f34ba1354498de03e6882c33f935b071e99 (patch)
tree1d0efd5a93487b23e2c7702a96ec788e0f90aa21 /drivers/target
parent42caa0edabd6a0a392ec36a5f0943924e4954311 (diff)
downloadlinux-b6cd7f34ba1354498de03e6882c33f935b071e99.tar.xz
scsi: target: make the pi_prot_format ConfigFS path readable
pi_prot_format conversion to write-only caused userspace breakage. Make the ConfigFS path readable again and hardcode the "0\n" content, matching previous output. Fixes: 6baca7601bde ("scsi: target: drop unused pi_prot_format attribute storage") Link: https://bugzilla.redhat.com/show_bug.cgi?id=1667505 Reported-by: Lee Duncan <lduncan@suse.com> Reported-by: Laura Abbott <labbott@redhat.com> Reviewed-by: Bart Van Assche <bvanassche@acm.org> Signed-off-by: David Disseldorp <ddiss@suse.de> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Diffstat (limited to 'drivers/target')
-rw-r--r--drivers/target/target_core_configfs.c8
1 files changed, 7 insertions, 1 deletions
diff --git a/drivers/target/target_core_configfs.c b/drivers/target/target_core_configfs.c
index 72016d0dfca5..8e7fffbb8802 100644
--- a/drivers/target/target_core_configfs.c
+++ b/drivers/target/target_core_configfs.c
@@ -852,6 +852,12 @@ static ssize_t pi_prot_type_store(struct config_item *item,
return count;
}
+/* always zero, but attr needs to remain RW to avoid userspace breakage */
+static ssize_t pi_prot_format_show(struct config_item *item, char *page)
+{
+ return snprintf(page, PAGE_SIZE, "0\n");
+}
+
static ssize_t pi_prot_format_store(struct config_item *item,
const char *page, size_t count)
{
@@ -1132,7 +1138,7 @@ CONFIGFS_ATTR(, emulate_3pc);
CONFIGFS_ATTR(, emulate_pr);
CONFIGFS_ATTR(, pi_prot_type);
CONFIGFS_ATTR_RO(, hw_pi_prot_type);
-CONFIGFS_ATTR_WO(, pi_prot_format);
+CONFIGFS_ATTR(, pi_prot_format);
CONFIGFS_ATTR(, pi_prot_verify);
CONFIGFS_ATTR(, enforce_pr_isids);
CONFIGFS_ATTR(, is_nonrot);