lightnvm: pblk: guarantee emeta on line close

If a line is recovered from open chunks, the memory structures for
emeta have not necessarily been properly set on line initialization.
When closing a line, make sure that emeta is consistent so that the line
can be recovered on the fast path on next reboot.

Also, remove a couple of empty lines at the end of the function.

Signed-off-by: Javier González <javier@cnexlabs.com>
Signed-off-by: Matias Bjørling <mb@lightnvm.io>
Signed-off-by: Jens Axboe <axboe@kernel.dk>

diff --git a/drivers/lightnvm/pblk-core.c b/drivers/lightnvm/pblk-core.c
index 36ac9ef..a314176 100644 (file)
--- a/drivers/lightnvm/pblk-core.c
+++ b/drivers/lightnvm/pblk-core.c
@@ -1775,6 +1775,17 @@ void pblk_line_close_meta(struct pblk *pblk, struct pblk_line *line)
        wa->pad = cpu_to_le64(atomic64_read(&pblk->pad_wa));
        wa->gc = cpu_to_le64(atomic64_read(&pblk->gc_wa));
 
+       if (le32_to_cpu(emeta_buf->header.identifier) != PBLK_MAGIC) {
+               emeta_buf->header.identifier = cpu_to_le32(PBLK_MAGIC);
+               memcpy(emeta_buf->header.uuid, pblk->instance_uuid, 16);
+               emeta_buf->header.id = cpu_to_le32(line->id);
+               emeta_buf->header.type = cpu_to_le16(line->type);
+               emeta_buf->header.version_major = EMETA_VERSION_MAJOR;
+               emeta_buf->header.version_minor = EMETA_VERSION_MINOR;
+               emeta_buf->header.crc = cpu_to_le32(
+                       pblk_calc_meta_header_crc(pblk, &emeta_buf->header));
+       }
+
        emeta_buf->nr_valid_lbas = cpu_to_le64(line->nr_valid_lbas);
        emeta_buf->crc = cpu_to_le32(pblk_calc_emeta_crc(pblk, emeta_buf));
 
@@ -1792,8 +1803,6 @@ void pblk_line_close_meta(struct pblk *pblk, struct pblk_line *line)
        spin_unlock(&l_mg->close_lock);
 
        pblk_line_should_sync_meta(pblk);
-
-
 }
 
 static void pblk_save_lba_list(struct pblk *pblk, struct pblk_line *line)