From 411036fa1924f5e5b0f7f9d04ae5d8cdc72fb839 Mon Sep 17 00:00:00 2001 From: NeilBrown Date: Tue, 8 Nov 2005 21:39:40 -0800 Subject: [PATCH] [PATCH] md: split off some md attributes in sysfs to a separate group Some, but not all, md array support data redundancy and hence support checking and restoring that redundancy (resync, rebuild). Some attributes apply specifically to functions involving this redundancy, and so should only appear for md arrays for which they are meaningful. i.e. they should not appear for raid0, linear, multpath, faulty. This patch separates these into a distinct group and creates the group only if the personality supports sync_request. Signed-off-by: Neil Brown Acked-by: Greg Kroah-Hartman Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- drivers/md/md.c | 14 ++++++++++++++ 1 file changed, 14 insertions(+) diff --git a/drivers/md/md.c b/drivers/md/md.c index b2d8813ed716..292dad31d5e5 100644 --- a/drivers/md/md.c +++ b/drivers/md/md.c @@ -1807,10 +1807,19 @@ md_mismatches = __ATTR_RO(mismatch_cnt); static struct attribute *md_default_attrs[] = { &md_level.attr, &md_raid_disks.attr, + NULL, +}; + +static struct attribute *md_redundancy_attrs[] = { &md_scan_mode.attr, &md_mismatches.attr, NULL, }; +static struct attribute_group md_redundancy_group = { + .name = NULL, + .attrs = md_redundancy_attrs, +}; + static ssize_t md_attr_show(struct kobject *kobj, struct attribute *attr, char *page) @@ -2047,6 +2056,8 @@ static int do_md_run(mddev_t * mddev) bitmap_destroy(mddev); return err; } + if (mddev->pers->sync_request) + sysfs_create_group(&mddev->kobj, &md_redundancy_group); atomic_set(&mddev->writes_pending,0); mddev->safemode = 0; mddev->safemode_timer.function = md_safemode_timeout; @@ -2155,6 +2166,9 @@ static int do_md_stop(mddev_t * mddev, int ro) set_disk_ro(disk, 0); blk_queue_make_request(mddev->queue, md_fail_request); mddev->pers->stop(mddev); + if (mddev->pers->sync_request) + sysfs_remove_group(&mddev->kobj, &md_redundancy_group); + module_put(mddev->pers->owner); mddev->pers = NULL; if (mddev->ro) -- 2.11.0