From 4f7f5c675fd6bacaae3c67be44de872dcff0e3b7 Mon Sep 17 00:00:00 2001 From: Brian Wood Date: Fri, 8 Feb 2008 02:11:24 +0000 Subject: [PATCH] dm: stripe enhanced status return This patch adds additional information to the status line. It is added at the end of the returned text so it will not interfere with existing implementations using this data. The addition of this information will allow for a common return interface to match that returned with the dm-raid1.c status line (with Jonathan Brassow's patches). Here is a sample of what is returned with a mirror "status" call: isw_eeaaabgfg_mirror: 0 488390920 mirror 2 8:16 8:32 3727/3727 1 AA 1 core Here's what's returned with this patch for a stripe "status" call: isw_dheeijjdej_stripe: 0 976783872 striped 2 8:16 8:32 1 AA Signed-off-by: Brian Wood Signed-off-by: Alasdair G Kergon --- drivers/md/dm-stripe.c | 23 ++++++++++++++++++++++- 1 file changed, 22 insertions(+), 1 deletion(-) diff --git a/drivers/md/dm-stripe.c b/drivers/md/dm-stripe.c index 7c5e2a0c3f2d..4de90ab3968b 100644 --- a/drivers/md/dm-stripe.c +++ b/drivers/md/dm-stripe.c @@ -222,16 +222,37 @@ static int stripe_map(struct dm_target *ti, struct bio *bio, return DM_MAPIO_REMAPPED; } +/* + * Stripe status: + * + * INFO + * #stripes [stripe_name ] [group word count] + * [error count 'A|D' ] + * + * TABLE + * #stripes [stripe chunk size] + * [stripe_name physical_start ] + * + */ + static int stripe_status(struct dm_target *ti, status_type_t type, char *result, unsigned int maxlen) { struct stripe_c *sc = (struct stripe_c *) ti->private; + char buffer[sc->stripes + 1]; unsigned int sz = 0; unsigned int i; switch (type) { case STATUSTYPE_INFO: - result[0] = '\0'; + DMEMIT("%d ", sc->stripes); + for (i = 0; i < sc->stripes; i++) { + DMEMIT("%s ", sc->stripe[i].dev->name); + buffer[i] = atomic_read(&(sc->stripe[i].error_count)) ? + 'D' : 'A'; + } + buffer[i] = '\0'; + DMEMIT("1 %s", buffer); break; case STATUSTYPE_TABLE: