lightnvm: add free and bad lun info to show luns

Add free block, used block, and bad block information to the show debug
interface. This information is used to debug how targets track blocks.

Also, change debug function name to make it more generic.

Signed-off-by: Javier Gonzalez <javier@cnexlabs.com>
Signed-off-by: Matias Bjørling <m@bjorling.me>
Signed-off-by: Jens Axboe <axboe@fb.com>

3 files changed, 17 insertions, 8 deletions

diff --git a/drivers/lightnvm/core.c b/drivers/lightnvm/core.c
index f61d325fd978..5178645ac42b 100644
--- a/drivers/lightnvm/core.c
+++ b/drivers/lightnvm/core.c
@@ -544,7 +544,7 @@ static int nvm_configure_show(const char *val)
         if (!dev->mt)
                 return 0;
 
-        dev->mt->free_blocks_print(dev);
+        dev->mt->lun_info_print(dev);
 
         return 0;
 }
diff --git a/drivers/lightnvm/gennvm.c b/drivers/lightnvm/gennvm.c
index 43c01e0af887..e20e74ec6b91 100644
--- a/drivers/lightnvm/gennvm.c
+++ b/drivers/lightnvm/gennvm.c
@@ -464,15 +464,24 @@ static struct nvm_lun *gennvm_get_lun(struct nvm_dev *dev, int lunid)
         return &gn->luns[lunid].vlun;
 }
 
-static void gennvm_free_blocks_print(struct nvm_dev *dev)
+static void gennvm_lun_info_print(struct nvm_dev *dev)
 {
         struct gen_nvm *gn = dev->mp;
         struct gen_lun *lun;
         unsigned int i;
 
-        gennvm_for_each_lun(gn, lun, i)
-                pr_info("%s: lun%8u\t%u\n",
-                                        dev->name, i, lun->vlun.nr_free_blocks);
+
+        gennvm_for_each_lun(gn, lun, i) {
+                spin_lock(&lun->vlun.lock);
+
+                pr_info("%s: lun%8u\t%u\t%u\t%u\n",
+                                dev->name, i,
+                                lun->vlun.nr_free_blocks,
+                                lun->vlun.nr_inuse_blocks,
+                                lun->vlun.nr_bad_blocks);
+
+                spin_unlock(&lun->vlun.lock);
+        }
 }
 
 static struct nvmm_type gennvm = {
@@ -490,7 +499,7 @@ static struct nvmm_type gennvm = {
         .erase_blk      = gennvm_erase_blk,
 
         .get_lun        = gennvm_get_lun,
-        .free_blocks_print = gennvm_free_blocks_print,
+        .lun_info_print = gennvm_lun_info_print,
 };
 
 static int __init gennvm_module_init(void)
diff --git a/include/linux/lightnvm.h b/include/linux/lightnvm.h
index 831a20cf070c..3db5552b17d5 100644
--- a/include/linux/lightnvm.h
+++ b/include/linux/lightnvm.h
@@ -380,7 +380,7 @@ typedef int (nvmm_end_io_fn)(struct nvm_rq *, int);
 typedef int (nvmm_erase_blk_fn)(struct nvm_dev *, struct nvm_block *,
                                                                 unsigned long);
 typedef struct nvm_lun *(nvmm_get_lun_fn)(struct nvm_dev *, int);
-typedef void (nvmm_free_blocks_print_fn)(struct nvm_dev *);
+typedef void (nvmm_lun_info_print_fn)(struct nvm_dev *);
 
 struct nvmm_type {
         const char *name;
@@ -404,7 +404,7 @@ struct nvmm_type {
         nvmm_get_lun_fn *get_lun;
 
         /* Statistics */
-        nvmm_free_blocks_print_fn *free_blocks_print;
+        nvmm_lun_info_print_fn *lun_info_print;
         struct list_head list;
 };