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authorBrian Wood <brian.j.wood@intel.com>2008-02-07 21:11:24 -0500
committerAlasdair G Kergon <agk@redhat.com>2008-02-07 21:11:24 -0500
commit4f7f5c675fd6bacaae3c67be44de872dcff0e3b7 (patch)
tree5825966577a4018047bc126922b1f815af905348
parenta25eb9446ad50027bc2082386e5358bedad087ed (diff)
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 <brian.j.wood@intel.com> Signed-off-by: Alasdair G Kergon <agk@redhat.com>
-rw-r--r--drivers/md/dm-stripe.c23
1 files changed, 22 insertions, 1 deletions
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,
222 return DM_MAPIO_REMAPPED; 222 return DM_MAPIO_REMAPPED;
223} 223}
224 224
225/*
226 * Stripe status:
227 *
228 * INFO
229 * #stripes [stripe_name <stripe_name>] [group word count]
230 * [error count 'A|D' <error count 'A|D'>]
231 *
232 * TABLE
233 * #stripes [stripe chunk size]
234 * [stripe_name physical_start <stripe_name physical_start>]
235 *
236 */
237
225static int stripe_status(struct dm_target *ti, 238static int stripe_status(struct dm_target *ti,
226 status_type_t type, char *result, unsigned int maxlen) 239 status_type_t type, char *result, unsigned int maxlen)
227{ 240{
228 struct stripe_c *sc = (struct stripe_c *) ti->private; 241 struct stripe_c *sc = (struct stripe_c *) ti->private;
242 char buffer[sc->stripes + 1];
229 unsigned int sz = 0; 243 unsigned int sz = 0;
230 unsigned int i; 244 unsigned int i;
231 245
232 switch (type) { 246 switch (type) {
233 case STATUSTYPE_INFO: 247 case STATUSTYPE_INFO:
234 result[0] = '\0'; 248 DMEMIT("%d ", sc->stripes);
249 for (i = 0; i < sc->stripes; i++) {
250 DMEMIT("%s ", sc->stripe[i].dev->name);
251 buffer[i] = atomic_read(&(sc->stripe[i].error_count)) ?
252 'D' : 'A';
253 }
254 buffer[i] = '\0';
255 DMEMIT("1 %s", buffer);
235 break; 256 break;
236 257
237 case STATUSTYPE_TABLE: 258 case STATUSTYPE_TABLE: