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dm cache: resolve small nits and improve Documentation

Browse source 
Document passthrough mode, cache shrinking, and cache invalidation.
Also, use strcasecmp() and hlist_unhashed().

Reported-by: Alasdair G Kergon <[email protected]>
Signed-off-by: Mike Snitzer <[email protected]>
This commit is contained in:
Mike Snitzer 2013-11-12 12:17:43 -05:00
commit 7b6b2bc98c
3 changed files with 34 additions and 12 deletions
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2
drivers/md/dm-cache-policy-mq.c
View file

@ -310,7 +310,7 @@ static void free_entry(struct entry_pool *ep, struct entry *e)
static struct entry *epool_find(struct entry_pool *ep, dm_cblock_t cblock)
{
struct entry *e = ep->entries + from_cblock(cblock);
return e->hlist.pprev ? e : NULL;
return !hlist_unhashed(&e->hlist) ? e : NULL;
}
static bool epool_empty(struct entry_pool *ep)

2
drivers/md/dm-cache-target.c
View file

@ -3057,7 +3057,7 @@ static int cache_message(struct dm_target *ti, unsigned argc, char **argv)
if (!argc)
return -EINVAL;
if (!strcmp(argv[0], "invalidate_cblocks"))
if (!strcasecmp(argv[0], "invalidate_cblocks"))
return process_invalidate_cblocks_message(cache, argc - 1, (const char **) argv + 1);
if (argc != 2)