diff options
Diffstat (limited to 'drivers/md/dm-target.c')
| -rw-r--r-- | drivers/md/dm-target.c | 20 |
1 files changed, 16 insertions, 4 deletions
diff --git a/drivers/md/dm-target.c b/drivers/md/dm-target.c index 26ea22b1a0d7..27e2992ff249 100644 --- a/drivers/md/dm-target.c +++ b/drivers/md/dm-target.c @@ -85,12 +85,15 @@ int dm_register_target(struct target_type *tt) int rv = 0; down_write(&_lock); - if (__find_target_type(tt->name)) + if (__find_target_type(tt->name)) { + DMERR("%s: '%s' target already registered", + __func__, tt->name); rv = -EEXIST; - else + } else { list_add(&tt->list, &_targets); - + } up_write(&_lock); + return rv; } EXPORT_SYMBOL(dm_register_target); @@ -119,6 +122,7 @@ static int io_err_ctr(struct dm_target *tt, unsigned int argc, char **args) * Return error for discards instead of -EOPNOTSUPP */ tt->num_discard_bios = 1; + tt->discards_supported = true; return 0; } @@ -145,6 +149,13 @@ static void io_err_release_clone_rq(struct request *clone, { } +static void io_err_io_hints(struct dm_target *ti, struct queue_limits *limits) +{ + limits->max_discard_sectors = UINT_MAX; + limits->max_hw_discard_sectors = UINT_MAX; + limits->discard_granularity = 512; +} + static long io_err_dax_direct_access(struct dm_target *ti, pgoff_t pgoff, long nr_pages, enum dax_access_mode mode, void **kaddr, pfn_t *pfn) @@ -154,13 +165,14 @@ static long io_err_dax_direct_access(struct dm_target *ti, pgoff_t pgoff, static struct target_type error_target = { .name = "error", - .version = {1, 5, 0}, + .version = {1, 6, 0}, .features = DM_TARGET_WILDCARD, .ctr = io_err_ctr, .dtr = io_err_dtr, .map = io_err_map, .clone_and_map_rq = io_err_clone_and_map_rq, .release_clone_rq = io_err_release_clone_rq, + .io_hints = io_err_io_hints, .direct_access = io_err_dax_direct_access, }; |