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scsi: target: make the pi_prot_format ConfigFS path readable

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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: 6baca7601b ("scsi: target: drop unused pi_prot_format attribute storage")
Link: https://bugzilla.redhat.com/show_bug.cgi?id=1667505
Reported-by: Lee Duncan <[email protected]>
Reported-by: Laura Abbott <[email protected]>
Reviewed-by: Bart Van Assche <[email protected]>
Signed-off-by: David Disseldorp <[email protected]>
Signed-off-by: Martin K. Petersen <[email protected]>
This commit is contained in:
David Disseldorp 2019-02-04 19:32:10 +01:00 • committed by Martin K. Petersen
commit b6cd7f34ba
1 changed files with 7 additions and 1 deletions
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8
drivers/target/target_core_configfs.c
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@ -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);